Power Allocation for Cognitive OFDM with Separated Interference Limits
In order to protect primary users communication, most existing power resource allocation methods focus solely on a total interference limit over all subchannels, which may lead to serious disturbance on some frequencies. In this paper, we investigate the power allocation problem for cognitive OFDM with interference limit on each subcarrier. By formulating the problem as a convex optimization, an optimal iterative allocation algorithm is proposed to maximize the cognitive throughput. Furthermore, a linear sub-optimal algorithm is proposed for fast convergence with little throughput loss. Finally, performances of our proposed algorithms are investigated by simulation results.
Cognitive Radio Orthogonal Frequency Division Multiplexing (OFDM) Power Allocation Interference Limit
Lei Li Baoyu Zheng
Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications, Nanjing, P.R.China
国际会议
北京
英文
187-190
2010-09-26（万方平台首次上网日期，不代表论文的发表时间）