An Efficient Power Allocation Algorithm for Relay Assisted Cognitive Radio Network
This paper considers a cognitive radio model where the secondary users (SUs) apply cooperative relay to fulfill the communication demand. Specially, under the constraint that the interference power introduced to primary users (PUs) is kept under a tolerable threshold, we investigate the system throughput maximization problem during the cognitive relay transmission. In order to make the formulated problem feasible to solve, Maclaurin expansions are employed as substitutions. Moreover, based on convex optimization theory, an iterative power allocation algorithm repeated between the powers of secondary source node and relay node is developed to obtain the optimal solution. Corroborant numerical examples are provided to illustrate the quick convergence behavior of the proposed algorithm and the superiority of applying cooperative relay in cognitive radio networks is also presented.
Zhongjun Liu Zhongjun Liu Dongmei Zhang Shaohua Guan
Institute of Communications Engineering,PLA University of Science and Technology, Nanjing 210007, China
国际会议
上海
英文
1-5
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）