Partial Relay Selection in Decode and Forward Cooperative Cognitive Radio Networks over Rayleigh Fading Channels

被引:1
作者
Zhong, Bin [1 ]
Zhang, Zhongshan [2 ,3 ]
Zhang, Dandan [2 ]
Long, Keping [2 ]
Cao, Haiyan [4 ]
机构
[1] Hunan Univ Sci & Technol, Sch Informat & Elect Engn, Xiangtan 411201, Hunan, Peoples R China
[2] Univ Sci & Technol Beijing, Beijing Engn & Technol Res Ctr Convergence Networ, Beijing 100083, Peoples R China
[3] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China
[4] Hangzhou Dianzi Univ, Coll Commun Engn, Hangzhou 310018, Peoples R China
基金
中国国家自然科学基金;
关键词
cognitive radio; cooperative networks; relays; decode and forward; OFDMA UPLINK TRANSMISSION; DIVERSITY; CAPACITY; SYSTEMS;
D O I
10.3837/tiis.2014.11.017
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The performance of an partial relay selection on the decode-and-forward (DF) mode cognitive radio (CR) relay networks is studied, with some important factors, including the outage probability, the bit error ratio (BER), and the average channel capacity being analyzed. Different from the conventional relay selection schemes, the impact of spectrum sensing process as well as the spectrum utilization efficiency of primary users on the performance of DF-based CR relaying networks has been taken into consideration. In particular, the exact closed-form expressions for the figures of merit such as outage probability, BER, and average channel capacity over independent and identically distributed (i.i.d.) Rayleigh fading channels, have been derived in this paper. The validity of the proposed analysis is proven by simulation, which showed that the numerical results are consistent with the theoretical analysis in terms of the outage probability, the BER and the average channel capacity. It is also shown that the full spatial diversity order can always be obtained at the signal-to-noise ratio (SNR) range of [0dB, 15dB] in the presence of multiple potential relays.
引用
收藏
页码:3967 / 3983
页数:17
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