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A Novel Active Spectrum Sensing Scheme for Cognitive MB-OFDM UWB Radio

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4 Author(s)
Qi Liu ; Key Laboratory of Universal Wireless Communication, Ministry of Education, China, Wireless Network Lab, Beijing University of Posts and Telecommunications. ; Luyong Zhang ; Zheng Zhou ; Yabin Ye

Spectrum awareness is the key technique for Cognitive Radio (CR). A special spectrum sensing scheme is necessary for Cognitive UWB radio (CUWB) because of its lower radio power and ultra wide bandwidth. Although CUWB transmitter and receiver could respectively detect the spectrum holes, they couldn't communicate with each other probably if they are out of the communication range or there isn't common usable spectrum segment for them. No sensing technique deals with these problems properly. In this paper a novel active spectrum sensing scheme for cognitive MB-OFDM UWB radio is presented to settle the above problems. The scheme takes full advantage of UWB and finds usable channels directly for CUWB transmitter and receiver through sending beacon signals and acknowledgement signals. This active spectrum sensing scheme is totally different from existing sensing methods and has its own advantages.

Published in:

2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)

Date of Conference:

15-17 May 2008