基于DF中继的认知OFDM协作系统的资源分配算法
赵晓晖, 沙京祺

Resource allocation algorithm in DF relay assisted OFDM cognitive radio systems
ZHAO Xiao-hui, SHA Jing-qi
图3 主用户和认知用户的频谱分布
Fig.3 PU and CR distribution in frequency domain