Organization: University of Ottawa
This RFID protocol secures radio frequency identification tags using minimal processing resources. RFID tag user can ensure the data stored on RFID tags cannot be deciphered by others, thereby protecting personal or product information from being read by others. Although there are other ways to protect data, they are not widely used as they are expensive to implement due to the high processing and power requirements. Our algorithms offer a low cost means to protect data transmitted by tags without compromising security. ...
Innovative Coding/Modulation Scheme Exploiting the Symbolic Dynamics of a Chaotic Map
Organization: University of California, San Diego (UC San Diego)
The invention realizes an innovative chaos-based encoding scheme. Namely, the binary information to be transmitted is encoded by exploiting the symbolic dynamics of a one-dimensional chaotic map. At the receiver side, the information is recovered by using maximum-likelihood estimation techniques. In particular, a Viterbi detector matched to the dynamics of the chaotic map has been designed. The use of concepts from symbolic dynamics for encoding the information allows certain degrees of freedom in the design of the detector. In fact, its ...
Joint AMC/ARQ Transmission for Wireless Systems
Organization: University of Victoria
In addition to packet loss performance improvement, the proposed design can ensure that only those packets that cannot arrive at the receiver with the delay constraint are dropped. With the three different retransmission options (namely the S-ARQ, GBN-ARQ, and SR- ARQ), the proposed design also allows the system designer to best achieve the tradeoff between performance and receiver complexity. Finally, the proposed design applies to various slot- based transmission systems.
Organization: University of Missouri Columbia
A CIRCUIT FOR HIGH QUALITY LONG-RANGE RADAR AND IMAGING APPLICATIONS
Organization: Sabanci University
The improvement achieved by this invention is that the circuit has two microstrip transmission lines and these lines are coupled which leads to a compact printed circuit board (PCB) implementation. The loads match with the characteristic impedances of the microstrip transmission lines which terminates the corresponding ports leading to lower loss and better matched circuit. UWB waveform generator circuit according to the present invention generates the derivative of the waveform using the even and odd mode propagations on the microstrip ...
Organization: Stanford University
High Efficiency Power Amplifier
Organization: Stanford University
Local Oscillator Phase Alignment System for Cartesian Feedback Power Amplifiers
Organization: Stanford University
Fragmentation of TCP Acknowledgements for Higher Throughput Connection Over Wireless Links
Organization: Stanford University
Power Controlled Multiple Access (PCMA) in Wireless Communication Networks
Organization: Stanford University
High Efficiency RF CMOS Power Amplifier and Wireless Transmitter
Organization: Stanford University
Location Aided Wireless System
Organization: Stanford University
Linear precoding method for MIMO wireless based on channel estimate and channel statistics
Organization: Stanford University
A Scalable Delay-Power Control Algorithm for Bandwidth Sharing in Wireless Networks
Organization: Stanford University
Density Calculation Algorithm for Multivariate Gaussian Distributions
Organization: Stanford University
Method and Apparatus for Harvesting and Transmission of Energy by Acoustical Means
Organization: Stanford University
Management of Cognitive Transmission in Primary Spectrum
Organization: Stanford University
Robust Decoding for MIMO Systems with imperfect channel state information
Organization: Stanford University
Low cost security system for phones and other devices
Organization: Stanford University
High Accuracy, Low Complexity Performance Prediction in Wireless Systems
Organization: Stanford University
Method for Efficient Communication with Implantable Devices
Organization: Stanford University
Energy-efficient Wireless Communications via Feedback
Organization: Stanford University
Organization: Stanford University
In this invention, we proposed a new antenna technology for the high frequency IC-based wireless communication systems. That is to introduce bumps to connect to a semiconductor chip to form a bump-on-chip antenna. The proposed technique overcomes the most serious problem in the on-chip antennas for their low and poor radiating gain by introducing external bump elements for radiation. Moreover, this invention also does not require having the expensive interconnection process like as the flip-chip. Therefore, it is the state of art antenna ...
Use of Feedback for Crosstalk Suppression in Co-channel Wireless Transmission
Organization: Stanford University
Co-channel Interference Cancellation
Organization: Stanford University
Timing and Frequency Synchronization for OFDM Signals
Organization: Stanford University
Blind synchronization of OFDM systems employing phase-shift keying
Organization: Stanford University
Dynamic Resource Allocating Multiple Access (DRAMA)
Organization: Stanford University
Adaptive Sectored Antenna System
Organization: Stanford University
Noise-Reducing Partitioning Scheme for Signal Processing Systems
Organization: Stanford University
Method for Handoff Using Pattern Recognition for Wireless Communication System
Organization: Stanford University
Tracking and Analysis of the Trajectory of a Transmitting Node in a Wireless Network
Organization: Indiana Univ-Purdue University Indianapolis
This invention is related to the tracking and analysis of the trajectory of a wireless node in a transmitting network. The algorithm collects a longitudinal record of motion of a transmitting node in a wireless network, and subsection location of the node. Applications involve the monitoring of subjects in a home or other well defined environment. Node location algorithms usually involve some calibration procedure which establishes the relationship between radio frequency transmission characteristics of a transmission node and the ...
Gravity Driven Pump with a Steady Flow Rate
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 2099BackgroundThe need for device miniaturization has led to the advent of microfluidic devices. Often called lab-on-a-chip, microfluidics devices strive to perform procedures that are difficult to accomplish with larger scale technologies, as well as reduce time, labor, and cost associated with such techniques. Such devices usually require pumps to supply fluid through the microchannels. To date, most systems use mechanical or non-mechanical pumps, with which steady flow rate may be difficult to achieve. In addition, these ...
Highly Efficient Miniaturized Slot Antenna
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 2271BackgroundAntennas have found numerous applications, especially as transmit and receive modules combined with miniaturized sensors and transducers in wireless systems. While recent advances in solid state devices and microelectromechanical systems (MEMS) technology have led to the realization of miniaturized, high performance antennas, efficiency and configurability of these antennas are less explored.Technology DescriptionResearchers at the University of Michigan have developed designs and fabricated miniaturized, ...
Transition-aware Global Signaling
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 2353BackgroundWires that propagate signals between logic stages on an integrated circuit can be implemented in different widths. The chosen width for such wires in a given integrated chip has significant affects on the propagation characteristics of the signal being carried over the wires. Certain integrated circuit applications, such as clock nets, require very fast signal transition times on the wires. To achieve the required signal transition times, such applications commonly use relatively wide wires to propagate signals between ...
Q-Control at RF Frequency in Micromechanical Mixer-Filters
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 2841BackgroundThe uses of handheld wireless instruments have grown considerably in recent year, with demands for voice, image, and data all on one device. This increasing demand has been the catalyst for miniature technology development and the MEMS research field has responded strongly. Both highly selective filtering and low-loss low-noise mixing are important for the function of communication receivers and these functions can now be combined in micromechanical mixer filters (mixlers). If separated, performance can be maximized ...
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 3030BackgroundDespite the advances made to support wireless sensor communications in biohazardous or harsh conditions, the transmitter electronics required for each sensor device can act as an application limiting factor in a number of ways, including cost, size, power consumption and, thus, operational lifetime. The transmitter, antenna, and other components necessary for wireless communication may collectively constitute the most expensive and sizeable module of a device, having a microfabricated sensor. A potentially greater ...
Slot Spiral Antenna with Integrated Balun and Feed
Organization: Indiana Univ-Purdue University Indianapolis
UM File # 1172BackgroundTechnology DescriptionApplicationsAdvantagesal antenna with a planar integrated balun and feed. The slot spiral is produced using standard printed circuit techniques and comprises a dielectric substrate having a conductive layer which is etched to form the radiating slot spiral. An integrated microstrip feed is included to provide a balanced feed to the slot spiral. Impedance matching is performed between the microstrip feed and the slotline of the slot spiral to maximize energy transfer. A shallow reflecting cavity is ...
Organization: Indiana Univ-Purdue University Indianapolis
UC San Diego inventors have come up with a low-complexity video compression engine, suitable for next generation interactive mobile phones. Using this invention, it is possible to transmit video sequences for video conferencing on a wireless channel. One of the most interesting features offered by this engine is the possibility to work both with the current mobile network infrastructure (9.6 kbps) as well as with the third generation (3G). This invention addresses the issues with current video compression technologies that, while they provide ...
Organization: Indiana Univ-Purdue University Indianapolis
UC San Diego engineers have developed a new family of devices for the control of calorie consumption in humans. The devices address the growing obesity problem in a unique way and can be used by athletes and others who focus on nutrition and calorie uptake in their daily activities. The invention can be exploited by medical device manufacturers, as well as direct-to-consumer manufacturers.
A New Very Low Bit Rate Coder-Decoder
Organization: Indiana Univ-Purdue University Indianapolis
UC San Diego researchers have invented a new system and method for signal coding and decoding that can achieve very low bit rates, and in particular a method for compression/restoration of oscillatory and semi-oscillatory data found in voiced speech, music, and image texture patterns for application in storage, distribution (download to portable devices), and transmission in various communication systems. The high-compression method can be used as a stand alone codec or be combined with existing methods for processing parts of the signal; for ...
A Cell-Phone Based Wireless and Mobile Brain-Machine Interface
Organization: Indiana Univ-Purdue University Indianapolis
User interfaces for cell phones have been keyboard based for years. This technology allows for more direct interaction with a user’s mobile, wireless electronic device. Unlike other brain-computer interface products, this invention uses a regular cell phone, which is receiving EEG signals, to process and visualize the data.The technology has been demonstrated by dialing a phone number with noninvasive EEG. Ten healthy subjects completed the dialing task with a mean accuracy of over 95 percent. It can be applied to gaming on cell ...
Beamforming Chip for Multiple Linear Array Antenna
Organization: Indiana Univ-Purdue University Indianapolis
This invention implements beam forming from a linear antenna array in a single-chip. It is a frequency independent time delay combiner device that is applicable to cellular base stations, WiFi or WiMax.
Innovative Coding/Modulation Scheme Exploiting the Symbolic Dynamics of a Chaotic Map
Organization: Indiana Univ-Purdue University Indianapolis
The invention realizes an innovative chaos-based encoding scheme. Namely, the binary information to be transmitted is encoded by exploiting the symbolic dynamics of a one-dimensional chaotic map. At the receiver side, the information is recovered by using maximum-likelihood estimation techniques. In particular, a Viterbi detector matched to the dynamics of the chaotic map has been designed. The use of concepts from symbolic dynamics for encoding the information allows certain degrees of freedom in the design of the detector. In fact, its ...
Organization: Indiana Univ-Purdue University Indianapolis
UCSD inventors have come up with a means for (1) perceptual video coding, (2) R-D optimization, (3) sub-pixel motion estimation within the H.264 video codec. This method reduced memory used (16 times less) and achieved better encoding times (50% faster). Using this invention it is possible to transmit real-time video over low-bit rate channels. This invention addresses the issues with current video compression technologies that, while they provide remarkable performance in terms of image quality, were designed without considering the ...
A/D Converters Based on Turbo-Coding Principles
Organization: Indiana Univ-Purdue University Indianapolis
This is a method for analog to digital conversion based on Turbo-coding principles from the field of information theory. This analog to digital converter (ADC) is for use in integrated system-on-a-chip (SOC) circuits requiring both high resolution and high data rate bandwidth. The first design studies and simulations indicate that this technique will achieve the theoretical maximum Shannon channel capacity conversion rate for a given quantizer resolution effective number of bits. The technology is a novel ADC concept based on Turbo codes, ...
An Input Signal Power Sensing Sentry for Smart-Sensor Applications
Organization: Indiana Univ-Purdue University Indianapolis
A design for low power CMOS system-on-a-chip mixed signal wireless sensor devices. The concept is used in devices to monitor vibration, audio, radiation or other signals, for which low power usage is important. Such applications can include wireless vibration sensors in mechanical equipment to detect a bad bearing or other machine fault, or for intrusion detection in a security system. This concept extends battery life by enabling a
Distributed Amplifiers with Built-In Filtering for UWB Impulse Radio
Organization: Indiana Univ-Purdue University Indianapolis
Distributed amplifiers are widely used in wideband systems, such as ultra wideband (UWB) radio, radar, ultra-fast instrumentation, high speed fiber optics communications and future wide band wireless systems for the home and office. The front end amplifiers for these applications require multi-gigahertz bandwidth and good out-of-band spectrum control to reject interference and reduce noise. UWB is a very low power wireless technology in which data is transmitted in short duration (nanosecond) pulses rather than a sine-wave RF carrier, as in ...
A Novel Authentication Scheme for Ad hoc and Sensor Wireless Networks
Organization: Indiana Univ-Purdue University Indianapolis
Microelectromechanical systems actuator based reconfigurable printed antenna
Organization: NASA Glenn Research Center
A Novel Authentication Scheme for Ad hoc and Sensor Wireless Networks
Organization: University of Cincinnati
An ad hoc (or "spontaneous") network is a local area network that exists only for the duration of the communication. Such a wireless network is usually employed in an emergency situation or in an unknown territory so that efficient and quick monitoring ofa nearby environment can be provided. Wireless ad hoc networks transmit packets of information and forward them from one node to another in peer to peer mode, without a base station that normally coordinates activities of mobile hosts. This allows for unrestricted mobility while still ...
Organization: Stanford University
High Efficiency Power Amplifier
Organization: Stanford University
Local Oscillator Phase Alignment System for Cartesian Feedback Power Amplifiers
Organization: Stanford University
Fragmentation of TCP Acknowledgements for Higher Throughput Connection Over Wireless Links
Organization: Stanford University
Power Controlled Multiple Access (PCMA) in Wireless Communication Networks
Organization: Stanford University
High Efficiency RF CMOS Power Amplifier and Wireless Transmitter
Organization: Stanford University
Location Aided Wireless System
Organization: Stanford University
Linear precoding method for MIMO wireless based on channel estimate and channel statistics
Organization: Stanford University
A Scalable Delay-Power Control Algorithm for Bandwidth Sharing in Wireless Networks
Organization: Stanford University
Density Calculation Algorithm for Multivariate Gaussian Distributions
Organization: Stanford University
Method and Apparatus for Harvesting and Transmission of Energy by Acoustical Means
Organization: Stanford University
Management of Cognitive Transmission in Primary Spectrum
Organization: Stanford University
Robust Decoding for MIMO Systems with imperfect channel state information
Organization: Stanford University
Low cost security system for phones and other devices
Organization: Stanford University
High Accuracy, Low Complexity Performance Prediction in Wireless Systems
Organization: Stanford University
Method for Efficient Communication with Implantable Devices
Organization: Stanford University
Energy-efficient Wireless Communications via Feedback
Organization: Stanford University
Organization: Stanford University
In this invention, we proposed a new antenna technology for the high frequency IC-based wireless communication systems. That is to introduce bumps to connect to a semiconductor chip to form a bump-on-chip antenna. The proposed technique overcomes the most serious problem in the on-chip antennas for their low and poor radiating gain by introducing external bump elements for radiation. Moreover, this invention also does not require having the expensive interconnection process like as the flip-chip. Therefore, it is the state of art antenna ...
Organization: Stanford University
In recent years, with the fast development of location based services(LBS), the accurate localization of mobile phones has attracted strong attention. The Global Positioning System(GPS) has been a good solver to this problem. The GPS provides high precision positioning results(under 10 meters) for mobile phones when there is no obstruction of the sky. However, in urban environments where there are high rise buildings blocking the GPS signal, the positioning accuracy is degraded significantly(can be worse than 100 meters). In extreme ...
Wireless Power Transmitting Antenna for Implanted Devices
Organization: Stanford University
Current techniques for wireless powering to implanted devices (receiver) are realized by external loop antennas (transmitter) with a near field coupling to deliver linearly polarized (LP) wave propagation into the human body. Because of characteristics of the linearly polarized wave, the power received by implant devices must be the same polarization with the optimal orientation of the transmitter. If the orientation and the polarization between the transmitter and the receiver are mismatched, the efficiency of power delivery to the implant ...
Use of Feedback for Crosstalk Suppression in Co-channel Wireless Transmission
Organization: Stanford University
Co-channel Interference Cancellation
Organization: Stanford University
Timing and Frequency Synchronization for OFDM Signals
Organization: Stanford University
Blind synchronization of OFDM systems employing phase-shift keying
Organization: Stanford University
Dynamic Resource Allocating Multiple Access (DRAMA)
Organization: Stanford University
Adaptive Sectored Antenna System
Organization: Stanford University
Noise-Reducing Partitioning Scheme for Signal Processing Systems
Organization: Stanford University
Method for Handoff Using Pattern Recognition for Wireless Communication System
Organization: Stanford University
Organization: McGill University
Ultra High Data Transmission Rates for MIMO Systems
Organization: McGill University
Organization: University of Louisville
Microwave Tomography Using Dynamic IEEE 802.15.4 Wireless Networks
Organization: University of Iowa Res Foundation
Wireless Electronic Pegboard for Quantification of Dexterity
Organization: Rice University
Game-Based Physical Therapy for Balance Rehabilitation and Gait Analysis
Organization: Rice University
Electronic Field Guide for Plant Exploration and Discovery
Organization: Columbia Tech Ventures
Low-voltage optical phase modulators and tunable filters
Organization: Columbia Tech Ventures
A high performance, low noise charge-pump phase-locked loop (PLL)
Organization: Columbia Tech Ventures
In-Band Feed-forward Interference Cancellation for Wireless Receivers
Organization: Columbia Tech Ventures
Low power, ultra-wide band radio transceiver for wireless data transmission
Organization: Columbia Tech Ventures
Organization: Columbia Tech Ventures
Machine learning in map estimation, message passing, and perfect graphs
Organization: Columbia Tech Ventures
Integrated Phased Array Antenna
Organization: Iowa State University
AMEE™ - Algorithmic Music Evolution Engine
Organization: WORLDiscoveries - University of Western Ontario
Traditionally, the focus in video game development has been on increasing the complexity and realism of video imaging to produce a life like portrayal of the action and characters. Only recently has there been interest in significantly improving the musical content in video games. AMEE™, a proprietary music generation software conceived at Western, can independently create aesthetically pleasing music for multiple applications, including video games. The music composition process is performed by recombining musical elements from ...
EMI Shielding Conductive Polymer
Organization: University of Alberta
Researchers at the University of Alberta have developed a type of metal nanowire and a unique method for mixing these nanowires with a polymer to create a novel EMI shielding material. When mixed using this proprietary technique, these nanowires form a sparse conductive network which allows for a much higher shielding effectiveness while maintaining a lower concentration of nanowires. For example, with a nanowire concentration of only 5 wt.% and a shield thickness of only 0.55 mm, an average shielding effectiveness of 19 ...
Adaptive Orthogonal Frequency Division Multiplexing System
Organization: WORLDiscoveries - University of Western Ontario
A robust adaptive transmission technique is being developed at The University of Western Ontario to address these challenges. Our proposed adaptive orthogonal frequency division multiplexing (OFDM) system offers a substantial improvement in spectrum efficiency and flexibility over conventional wireless communication systems. In this system, precoded cyclic prefix (PCP) provides a mechanism of sensing characteristics for spectrum sharing and eliminates the preambles and handshaking process that would otherwise occur upon any change in ...
Handheld Platform for Audiology and Speech Language Pathology
Organization: WORLDiscoveries - University of Western Ontario
Our inventors developed a flexible, portable, versatile handheld platform that will be useful for a variety of Audiology and Speech Language Pathology applications. Specific components of this handheld platform include: an innovative high quality wireless headset interface with an integrated precision sound level controller for delivering and recording speech and audio stimuli; and software building blocks for audiometric signal generation, hearing aid simulation, and the display of temporal and spectral speech features. Identified ...
Organization: McGill University
Improved Method And Design For Transmitting Multimedia Data In Mobile Wireless Applications
Organization: University of California, Berkeley (UC Berkeley)
Improved Media Access Protocol For Wireless Sensor Networks
Organization: University of California, Berkeley (UC Berkeley)
Broad Bandwidth And Highly Reflective Gratings
Organization: University of California, Berkeley (UC Berkeley)
Simplified Oscillator Circuit Design For Resonators
Organization: University of California, Berkeley (UC Berkeley)
Very Low Cost Wireless Galvanostat With Nanoamp Resolution
Organization: University of California, Berkeley (UC Berkeley)
High Efficiency Hybrid Voltage Regulators For Rf And Audio Frequency Devices
Organization: University of California, Berkeley (UC Berkeley)
High Efficiency Power Amplification Configuration For Portable Wireless Devices
Organization: University of California, Berkeley (UC Berkeley)
Method And Apparatus For Scheduling Cells In An Input Queued Switch
Organization: University of California, Berkeley (UC Berkeley)
Waveform Prefiltering For Broadband Full-Duplex Radio
Organization: University of California, Riverside (UCR)
Figure 1 is the test equipment where the bottom MXG serves as primary transmit chain connected to a transmit antenna, and the top MXG serves as secondary transmit chain connected to a receive antenna via power combiner. Figure 2 is a spectrum of interference before cancellation. Figure 3 is a spectrum of interference after cancelation, showing a cancelation of 38.38dB .
Matching-pursuit Video Coding System
Organization: University of California, Berkeley (UC Berkeley)
Methods For Increased Channel Capacity Beyond Cdma
Organization: University of California, Berkeley (UC Berkeley)
In-vivo Wireless Physiological Sensor Platform
Organization: University of California, Los Angeles (UCLA)
Researchers at UCLA have developed a modular multi-sensor and actuator platform that can be implanted with minimally invasive techniques (IV catheter). The platform utilizes MEMS technology and its modular design enables the integration of various sensor and actuator components.
High Frequency Mixer Based On Non-linear Phenomena In Ferromagnetic Films
Organization: University of California, Los Angeles (UCLA)
The invention discloses a new high frequency mixer structure for use in radio transceivers. The structure uses the non-linear magnetic properties associated with ferromagnetic materials for frequency conversion. The ferromagnetic structure allows for improved mixer performance and lower power consumption. Because the structure merely requires one simple additional processing step, it is straightforward to implement the device in standard silicon CMOS or BiCMOS fabrication technologies.
Miniaturized Split Ring Resonator Planar Antenna
Organization: University of California, Los Angeles (UCLA)
Researchers at UCLA have developed a novel antenna structure based on a vertical split ring resonator configuration that allows for miniaturization while maintaining its small size, good radiation efficiency and high bandwidth performance.
Organization: University of California, San Diego (UC San Diego)
UC San Diego inventors have come up with a low-complexity video compression engine, suitable for next generation interactive mobile phones. Using this invention, it is possible to transmit video sequences for video conferencing on a wireless channel. One of the most interesting features offered by this engine is the possibility to work both with the current mobile network infrastructure (9.6 kbps) as well as with the third generation (3G). This invention addresses the issues with current video compression technologies that, while they provide ...
Organization: University of California, San Diego (UC San Diego)
UC San Diego engineers have developed a new family of devices for the control of calorie consumption in humans. The devices address the growing obesity problem in a unique way and can be used by athletes and others who focus on nutrition and calorie uptake in their daily activities. The invention can be exploited by medical device manufacturers, as well as direct-to-consumer manufacturers.
A New Very Low Bit Rate Coder-Decoder
Organization: University of California, San Diego (UC San Diego)
UC San Diego researchers have invented a new system and method for signal coding and decoding that can achieve very low bit rates, and in particular a method for compression/restoration of oscillatory and semi-oscillatory data found in voiced speech, music, and image texture patterns for application in storage, distribution (download to portable devices), and transmission in various communication systems. The high-compression method can be used as a stand alone codec or be combined with existing methods for processing parts of the signal; for ...
Beamforming Chip for Multiple Linear Array Antenna
Organization: University of California, San Diego (UC San Diego)
This invention implements beam forming from a linear antenna array in a single-chip. It is a frequency independent time delay combiner device that is applicable to cellular base stations, WiFi or WiMax.
Cell-Phone Based Wireless and Mobile Brain-Machine Interface
Organization: University of California, San Diego (UC San Diego)
UC San Diego inventors have designed patent pending techniques, apparatus and systems to implement a BCI which features wearable and wireless EEG acquisition hardware and software compatible with a mobile device (e.g. cell-phone) to provide a platform for BCI applications in real-world environments, such as dialing a phone number.
Organization: University of California, San Diego (UC San Diego)
UCSD inventors have come up with a means for (1) perceptual video coding, (2) R-D optimization, (3) sub-pixel motion estimation within the H.264 video codec. This method reduced memory used (16 times less) and achieved better encoding times (50% faster). Using this invention it is possible to transmit real-time video over low-bit rate channels. This invention addresses the issues with current video compression technologies that, while they provide remarkable performance in terms of image quality, were designed without considering the ...
A Brain-Machine Interface for Communication with Ventilated Patients
Organization: University of California, San Diego (UC San Diego)
UC San Diego researchers have designed a mobile steady state visual evoked potential (SSVEP) based brain-computer interface for communicating with mechanically ventilated patients. SSVEP is the electrical response of the brain to a flickering visual stimulus at a rate higher than 6Hz. With stimulation, an increase in amplitude is seen at the stimulus frequency from EEG recordings. This invention uses a tablet device that serves both as the source of visual evoked potentials, and as the processing instrument by which patient selections will be ...
Organization: Wisconsin Alumni Research Foundation (WARF)
Currently, multiple antennas are used at both the transmitter and receiver in wireless communication systems. Wireless channel capacity is expanded by increasing the number of transmit antennas. Due to the high-dimensional nature of multiple antenna array systems, methods for reducing interference have been developed to lower the computational complexity required for practical systems. Space-time processing is a key technology for removing interference, which allows full realization of wireless channel capacity. A promising space-time ...
High-Power-Gain, Bipolar Transistor Amplifier
Organization: Wisconsin Alumni Research Foundation (WARF)
Silicon is a relatively inexpensive material for making integrated power amplifiers for communications devices such as cell phones; however, these power amplifiers are generally limited to low power at high frequencies. UW-Madison researchers have developed a silicon-based bipolar transistor and an associated configuration that allow for maximum power performance at high frequencies. The transistor can be either a silicon bipolar junction transistor or a silicon-germanium heterojunction bipolar transistor. The invention uses a common-base ...
Smart Leaf Technology - Floating Semiconductor Membranes for Wireless Sensing
Organization: Wisconsin Alumni Research Foundation (WARF)
Sensors currently used for detecting the presence of a given analyte, such as a toxin, in solution or in air require direct contact with a power supply. Distributed sensing systems or “sensor networks” are an emerging technology that promise the ability to wirelessly monitor and manipulate an environment via a spatially distributed network of small and inexpensive sensor nodes. UW-Madison researchers have developed wireless sensors made from nanoscale membranes for use in detecting the presence or absence of analytes, systems ...
Method for Improving Performance in a Sparse Multipath Environment Using Reconfigurable Arrays
Organization: Wisconsin Alumni Research Foundation (WARF)
The most salient feature of wireless communication channels is signal propagation over multiple scattering paths. Although this so-called multipath signal propagation leads to undesirable signal fading, it is an important resource for increasing the capacity and reliability of wireless links. In particular, multi-element antenna arrays offer a promising means to improve the rate and reliability of wireless communication devices. However, existing multi-antenna technologies were developed on the assumption of a rich multipath ...
An Improved Method for Analyzing Wireless Broadcasts
Organization: Wisconsin Alumni Research Foundation (WARF)
In wireless telecommunications, signals are transmitted and received over transmission channels within a limited range of frequencies, typically between 0.7 GHz to 6 GHz for domestic applications. Due to the limited amount of transmission space, it is increasingly important to perfect techniques that estimate channel state information (CSI) at the transmitter and/or receiver to maximize wireless performance over the multipath channels. In modern communication systems training-based channel learning techniques are commonly used to retrieve the ...
Apparatus and Algorithms for Channel Management in Wireless Local Area Networks
Organization: Wisconsin Alumni Research Foundation (WARF)
Wireless local area networks (WLANs) operate in a limited spectrum. As a result, WLANs require the efficient management of bandwidth to provide adequate access to networks. Computers and other devices access WLANs through access points (APs) which are assigned a specific frequency channel. As a basic design rule when assigning channels, APs within range of one another are set to different “non-overlapping” channels to reduce interference. Such conventional channel assignment techniques often do not result in optimal bandwidth ...
Distributed Scheduling Method for Multi-Antenna Wireless Data Communication System
Organization: Wisconsin Alumni Research Foundation (WARF)
High-speed wireless data communications systems, such as wireless metropolitan area networks (MANs) operating with multiple input-multiple output (MIMO) systems, use multiple antennas on transmitters and receivers. These commonly used systems can support one customer per antenna. Maximizing the efficiency of these antennas allows wireless providers to support more customers and earn more revenue. One way of optimizing multi-user communication involves a process called “beam forming,” which allows simultaneous communication over ...
Improved High-Power Transistor Amplifier for Wireless Communications
Organization: Wisconsin Alumni Research Foundation (WARF)
The demand for smaller wireless communication devices that use less power is growing. In particular, radio frequency identification (RFID) systems require small, low-power transmitters to label or “tag” objects. As a result, transistor amplifiers that maximize power handling capability for a given transistor size are desired. Heterojunction bipolar transistors (HBTs) can handle signals of very high frequencies up to several hundred gigahertz. Modern ultrafast circuits, mostly radio frequency (RF) systems, require high power ...
Multi-Rate Data Transmission Using Standard Hardware for Continuous Mobility in Wireless Devices
Organization: Wisconsin Alumni Research Foundation (WARF)
The wireless connection of devices such as portable computers to the Internet allows a user to work at a variety of locations, but the connection typically is suspended when moving between locations. To achieve continuous mobility, as expected by users of wireless devices like phones and music players, a real-time Internet connection with minimal delay between locations is required. Currently, the adaptation mechanisms used in 802.11-based WiFi links are relatively slow for the fast changing demands of these devices and result in wasted ...
Wireless Device Identification through Radiometric Signatures
Organization: Wisconsin Alumni Research Foundation (WARF)
Providing security for data transmitted electronically over a computer network is important to prevent theft of data or services, preserve privacy and prevent the introduction of viruses. One method of ensuring network security involves checking the identity of network users to ensure they are authorized for use; however, reliably determining the identity of a user is not simple because it is relatively easy to forge identification information over a wireless network. Thus, a system to consistently determine true identification data of a ...
Wireless Autonomous Device Data Transmission
Organization: University of Pittsburgh
Apparatus for Wireless Power and Data Transfer Over a Distance
Organization: University of Pittsburgh
URMC Receives Patent for Implantable Diagnostic Technology
Organization: University of Rochester
The University of Rochester Medical Center (URMC) has received a U.S. patent for a medical device technology that could revolutionize the way that physician’s monitor the health of their patients. The device – which consists of an implantable “living chip” – is designed to give doctors real time information on their patients’ health and, more importantly, alert them to a change in their condition. The URMC technology consists of a chip that holds the potential to identify – faster and more accurately – physiologic and chemical changes in ...
NASA Technology Enables Better Patient Care
Organization: NASA Glenn Research Center
Smaller, smarter biometric device remotely monitors vital signs in real time A biomedical device originally developed to monitor the health of astronauts in space is now available to help doctors remotely monitor their patients. Developed under NASA-sponsored research and now sold by FlexLife Health, Inc., vMetrics™ is a lightweight, compact, wireless device for home health monitoring. The easy-to-use, two-way system also allows patients to communicate with health care providers outside of a clinical or hospital setting. The wearable ...
