Research on power allocation method in cognitive radio based on OFDM
Cong Xu, Wang Jing-ning, Liu Yu-tao, Chen Xiao-xi, Zhiqun Song · 2011
Cognitive Radio requires improving spectrum utilization, and focusing on complexity of the sub carrier power allocation algorithm in OFDM system, A power allocation method which plots the entire channel into lots sub carriers segments is proposed. It gets the maximum communication throughput by auto-adapted modulation. After improved the method, the system performance is also improved. The result showed that method can improve the spectrum efficiency.