Adaptive Orthogonal Frequency Division Multiplexing System

Organization Name	WORLDiscoveries - University of Western Ontario
Institutional ID Number	2147
Technology Tags or Keywords	bindra broadband communications & information computer science computerscience digital digital broadcasting hybrid domain equalization intercarrier interference intersymbol interference ofdm physical science physicalsciences precoded cyclic prefix unlicensed communications wireless wireless communications
Summary	A flexible, robust and efficient platform for wireless or wireline transmission communications.
Technology Benefit	The following commercial applications have been identified: Unlicensed broadband access- Efficient use of the spectral white spaces for high speed data transmission. Mobile multimedia communication devices-Personal/portable operation for peer-to-peer communication similar to WI-FI for wireless in-home LANs.
Technology Applications	--
Technology page URL	worldiscoveries.ca
Detailed Technology Description	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 transmission parameters. The result is a flexible, robust and efficient platform for wireless or wireline transmission communications.
TTO homepage URL	--
URL to link to documents, images, videos, etc.	--
Additional Information	Track Code W-AI-054 Background Today’s prevalence of multimedia communication devices places a high demand on wireline and wireless communication systems, already failing in many respects. The wide range of user applications and requirements, coupled with the fast variation of wireless channels, places added pressure on the already overcrowded and inefficiently allocated conventional radio spectrum. These conditions have driven the costof deploying new wireless services to unreasonable heights. User mobility, the short wavelength of a broadband wireless signal, and the constant change in traffic from low voice to high internet browsing or broadband video communications places a constant load on the multimedia communication systems. To make matters worse, traditional design methodology anticipates the "worst case" wireless channel condition, a scenario that can result in a total commitment of system resources to one sole user. Great efficiencies in bandwidth utilization, battery power, reducing latency, and other communication resources stand to be gained by adapting transmission parameters to current mobile and fixed multimedia communications conditions and requirements.

Information