Underlay cognitive relay networks with imperfect channel state information and multiple primary receivers

被引:19
作者
Huang, Haiyan [1 ]
Li, Zan [1 ]
Si, Jiangbo [1 ]
Guan, Lei [1 ]
机构
[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
relay networks (telecommunication); cognitive radio; wireless channels; radio receivers; radiofrequency interference; decode and forward communication; probability; underlay cognitive relay networks; imperfect channel state information; multiple primary receivers; PU; multiple proactive partial decode-and-forward relays; relay selection channels; interference channels; instantaneous CSI; outage probability; interference probability; IP; secondary user; SU; adaptive power control scheme; OUTAGE PROBABILITY ANALYSIS; PERFORMANCE ANALYSIS; CAPACITY; ACCESS; RADIO;
D O I
10.1049/iet-com.2014.0429
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this study, the authors investigate the effect of imperfect channel state information (CSI) on underlay cognitive radio networks in the presence of multiple primary users (PUs). Particularly, with multiple proactive partial decode-and-forward (DF) relays available, both the relay selection channels and interference channels are assumed to be imperfect. In this context, firstly, based on the instantaneous CSI (ICSI) of interference channels, exact closed form expressions for the outage probability (OP) and the interference probability (IP) are derived, where IP is used as a performance metric to quantify the impact of harmful interference caused by secondary user (SU) on PUs. It is shown that, when the ICSI of interference channels are imperfect, the secondary networks always interfere with PUs' communications. Then, to reduce the harmful interference caused by secondary nodes, we propose an adaptive power control scheme relying on the partial CSI (PCSI) of interference channels. Finally, simulation results verify the accuracy and effectiveness of the author's analytical study, and indicate the proposed scheme strikes a good tradeoff between the interference introduced by secondary nodes on PUs and SU's performance.
引用
收藏
页码:460 / 467
页数:8
相关论文
共 25 条
[1]   Performance Analysis of Maximum Ratio Combining with Imperfect Channel Estimation in the Presence of Cochannel Interferences [J].
Ahn, Kyung Seung ;
Heath, Robert W., Jr. .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2009, 8 (03) :1080-1085
[2]  
[Anonymous], 2002, 02135 FCC
[3]   Cooperative communications with outage-optimal opportunistic relaying [J].
Bletsas, Aggelos ;
Shin, Hyundong ;
Win, Moe Z. .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2007, 6 (09) :3450-3460
[4]   Outage probability analysis of partial AF relay selection in spectrum-sharing scenario with multiple primary users [J].
Chen, J. ;
Li, Z. ;
Si, J. ;
Huang, H. ;
Gao, R. .
ELECTRONICS LETTERS, 2012, 48 (19) :1211-U63
[5]   On the Performance of Spectrum Sharing Cognitive Relay Networks with Imperfect CSI [J].
Chen, Junjie ;
Si, Jiangbo ;
Li, Zan ;
Huang, Haiyan .
IEEE COMMUNICATIONS LETTERS, 2012, 16 (07) :1002-1005
[6]  
Chen X., 2012, P CROWNC JUN
[7]   Cognitive Relay Networks With Multiple Primary Transceivers Under Spectrum-Sharing [J].
Duong, Trung Q. ;
Yeoh, Phee Lep ;
Vo Nguyen Quoc Bao ;
Elkashlan, Maged ;
Yang, Nan .
IEEE SIGNAL PROCESSING LETTERS, 2012, 19 (11) :741-744
[8]   Breaking Spectrum Gridlock With Cognitive Radios: An Information Theoretic Perspective [J].
Goldsmith, Andrea ;
Jafar, Syed Ali ;
Maric, Ivana ;
Srinivasa, Sudhir .
PROCEEDINGS OF THE IEEE, 2009, 97 (05) :894-914
[9]  
Jeffrey A., 2007, Table of integrals, Series, and Products
[10]  
Jing T, 2012, IEEE INFOCOM SER, P1764, DOI 10.1109/INFCOM.2012.6195549