认知无线电线性自信号消除带内频谱感知方法

In-band Spectrum Sensing for Cognitive Radio by Linear Self-signal Elimination

利用无线衰落信道AR模型,提出了一种不需要静默期的基于线性自信号消除的认知无线电主用户信号检测方法。该方法无需为避免静默期而频繁地中断通信,提高了通信效率和服务质量。仿真结果表明,该算法在多普勒频移较大时优于已有的无静默期带内频谱感知方法,在满足IEEE 802.22无线区域网主用户信号检测需求的同时,增强了系统频谱感知的性能。

An in-band spectrum sensing method is proposed based on linear self-signal elimination for cognitive radio（CR） by using the AR model of wireless fading channel. With this method, it is unnecessary to interrupt the communication to avoid the usage of quiet period and guarantee the performance of the network. The simula- tion results show that the proposed method is better than the existing in-band spectrum sensing methods without quiet period when the Doppler frequency shift is large. The algorithm achieves an acceptable detection perfor- mance for IEEES02.22 system and improves the performance of spectrum sensing.