Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (9): 2101-2105.doi: 10.3969/j.issn.1001-506X.2011.09.34

Previous Articles     Next Articles

Opportunistic cooperative transmission scheme and its BER performance analysis in cognitive wireless networks

CHU Yu-zhi1,2, ZHENG Bao-yu1,2   

  1. 1. Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
    2. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Online:2011-09-17 Published:2010-01-03

PDF (PC)

Abstract:

With the increase of primary user’s (PU) transmission performance, the cognitive user’s (CU) performance will be decreased rapidly in cognitive wireless networks (CWNs). A new opportunistic cooperative transmission scheme based on spectrum sensing in CWNs is proposed. Then, a closedform expression of average bit error ratio (BER) for the proposed scheme is presented over Rayleigh fading channels. Numerical simulations are conducted to compare the proposed scheme with the traditional noncooperative transmission, showing the merits of the proposed scheme in terms of BER, and the transmission performance of CU in CWNs are improved without interfering with the regular transmissions of  PU.

[an error occurred while processing this directive]