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| A New Adaptive Detection Algorithm of the Spectrum-hole on Cognitive Radio |
| Wang Hong-jun①② Bi Guang-guo① |
①(National Mobile Communications Research Laboratory of the Southeast University, Nanjing 210096, China)
②(Key Laboratory of Electronic Restriction of Anhui province in EEI, Hefei 230037, China) |
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Abstract According to the actual spectrum demand of cognitive radio, a new spectrum-hole detection algorithm, which bases on triple matrix accumulation, is presented for?cognitive?radio?systems?for?the?first?time by the study on weak signal detection technology. The algorithm combines spectrum-domain block adaptive filtering with matrix reshape, accumulate products estimation and frequency-domain smoothing to realize the weak signal detection. Finally, the performance of the algorithm is analyzed and?simulated?by?using?a?QPSK?signal. The result shows that the detection technology can detect weak signal quickly and effectively, and has a higher detection probability. The detection technology may be applied wholly to cognitive radio field.
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Received: 12 October 2009
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Corresponding Authors:
Wang Hong-jun
E-mail: hongjun-wang@163.com
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2010, Vol. 32 
