基于天线选择的多天线频谱感知技术

Multiantenna Spectrum Sensing Based on Antenna Selection

为了保护主用户系统不受认知用户的影响,提高频谱检测的可靠性,提出了一种新的基于天线选择和能量感知的频谱检测算法。该算法利用认知用户多个接收天线的感知信息,根据认知用户与主用户之间信道的差异,充分利用多天线的空间分集,选择部分使得检测概率最大化的天线进行合作检测。仿真结果表明,基于天线选择和能量感知的多天线频谱检测可有效地提高感知数据可靠性,感知数据的检测概率显著提高。

To protect the primary user and improve the credibility of spectrum detection, a novel spectrum sensing algorithm based on antenna selection and energy detection was proposed. Utilizing the spectrum sensing information form multiple receiver antenna of cognitive users and using the space diversity of multiantenna based on the channel difference between cognitive and primary user, the novel algorithm selects part of the antenna which maximizes he detection probability to cooperatively detect. Simulation results show that the novel algorithm can improve the credibility of the sensing and the detection probability is increased obviously.