A design of multi-cycle detector for cognitive radios

doi:10.1007/s11460-011-0180-9

Front Elect Electr Eng Chin

2011, Vol. 6

Issue (4) : 501-506 https://doi.org/10.1007/s11460-011-0180-9

RESEARCH ARTICLE

A design of multi-cycle detector for cognitive radios

Jun WANG(

), Guangguo BI

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

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Abstract

Cognitive radio (CR) is a promising technology. The most fundamental problem of CR is spectrum sensing. Energy detector is often considered for spectrum sensing in CR, and if the noise power is exactly known, energy detector has admirable performance. However, in practice, noise power is always inexactly known. To solve this problem, Dandawate [Dandawate et al. IEEE Transactions on Signal Processing, 1994, 42(9): 2355–2369] has proposed a nonparametric single-cycle detector based on cyclostationarity, which is robust to noise uncertainty. In this paper, based on Dandawate’s single-cycle detector, a joint multi-cycle detector is further proposed, which is also nonparametric and immune from noise uncertainty. Simulation results have shown the validity and superiority over single-cycle detector of the proposed detector.

Keywords cognitive radio (CR) cyclostationarity noise uncertainty spectrum sensing

Corresponding Author(s): WANG Jun,Email:wangjun_online@hotmail.com

Issue Date: 05 December 2011

Cite this article:

Jun WANG,Guangguo BI. A design of multi-cycle detector for cognitive radios[J]. Front Elect Electr Eng Chin, 2011, 6(4): 501-506.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-011-0180-9
https://academic.hep.com.cn/fee/EN/Y2011/V6/I4/501

Fig.1 CAF of an OFDM signal

Fig.2 Comparison between single-cycle detector and joint multi-cycle detector, = [0], = 0.05, and SNR= -10 dB

Fig.3 ROC curves of a joint multi-cycle detector and an energy detector with different noise uncertainties, = [0], SNR= -10 dB, and = 4000

Fig.4 SNR versus detection probability curves of different multi-cycle detectors and energy detector with different noise uncertainties, = [0], = 0.05, and = 4000

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