POWER CONTROL STRATEGIES FOR MULTICHANNEL COGNITIVE WIRELESS NETWORKS WITH OPPORTUNISTIC INTERFERENCE CANCELLATION  

作　　者：Tang Zhenzhou Hu Qian Yu Guanding 

机构地区：[1]College of Physics and Electronic Information, Wenzhou University, Wenzhou 325000, China [2]Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, Hangzhou 310027, China

出　　处：《Journal of Electronics(China)》2008年第2期268-273,共6页电子科学学刊（英文版）

基　　金：the China Post Doctoral Science Foundation (No.20070410396);the National Hi-Tech Re-search and Development Project (863 Project) of China (No.2007AA01Z257).

摘　　要：In this letter,an Opportunistic Interference Cancellation(OIC) is first introduced as a rate control strategy for secondary user in cognitive wireless networks. Based on the OIC rate control method,an optimal power control strategy for multichannel cognitive wireless networks is proposed. The algorithm aims to maximize the total transmit rate of cognitive user through appropriately controlling the transmit power of each subchannel under the constraint that the interference temperature at the primary receiver is below a certain threshold. Three suboptimal power control methods,namely Equal Power Transmission(EPT) ,Equal Rate Transmission(ERT) and Equal Interference Transmission(EIT) ,are also proposed. The performances of the proposed power control methods are compared through numerical simulations.In this letter, an Opportunistic Interference Cancellation （OIC） is first introduced as a rate control strategy for secondary user in cognitive wireless networks. Based on the OIC rate control method, an optimal power control strategy for multichannel cognitive wireless networks is proposed. The algorithm aims to maximize the total transmit rate of cognitive user through appropriately controlling the transmit power of each subchannel under the constraint that the interference temperature at the primary receiver is below a certain threshold. Three suboptimal power control methods, namely Equal Power Transmission （EPT）, Equal Rate Transmission （ERT） and Equal Interference Transmission （EIT）, are also proposed. The performances of the proposed power control methods are compared through numerical simulations.

关 键 词：Cognitive wireless networks Interference temperature Power control Interference cancellation 

分 类 号：TN925.93[电子电信—通信与信息系统]