Abstract / Description of output
A significant challenge of cognitive radio (CR) is to perform wideband spectrum sensing in a fading environment. In this paper, a novel multi-rate sub-Nyquist spectrum detection (MSSD) system is introduced for cooperative wideband spectrum sensing in a distributed CR network. Using only a few number of sub-Nyquist samples, MSSD is able to sense the wideband spectrum without the full spectrum recovery. Specifically, given the low spectrum occupancy, sub-Nyquist sampling is performed in each sampling channel, and a test statistic is formed by using sub-Nyquist samples from multiple sampling channels. In order to improve the system detection performance, we propose to use different sub-Nyquist sampling rates. After that, we analyze the performance of MSSD over both non-fading and Rayleigh fading channels. Numerical results show that MSSD can considerably improve the wideband spectrum sensing performance in a fading scenario, with a relatively low implementation complexity and a low computational complexity.
| Original language | English |
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| Pages | 1-6 |
| Number of pages | 6 |
| DOIs | |
| Publication status | Published - 1 Dec 2011 |
| Event | GLOBECOM 2011 - 2011 IEEE Global Communications Conference - Houston, TX, USA Duration: 5 Dec 2011 → 9 Dec 2011 |
Conference
| Conference | GLOBECOM 2011 - 2011 IEEE Global Communications Conference |
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| City | Houston, TX, USA |
| Period | 5/12/11 → 9/12/11 |
Keywords / Materials (for Non-textual outputs)
- Spectrum sensing
- Cognitive radio
- Rayleigh fading