提出了一种随机解调器压缩采样重构成败的判定方法.该方法利用两次连续重构所得稀疏信号支撑之间的相关性来判断重构是否成功,其计算复杂度低,易于实现.仿真结果表明,该方法能准确判断随机解调器压缩采样重构成败,用于宽带频谱感知中能够显著降低信号不稀疏时对主用户的干扰概率. A method of judging the success or failure of compression sampling and reconstruction of a random demodulator is proposed.The method uses the correlation between sparse signal support obtained by two successive reconstructions to determine whether the reconstruction is successful or not and the computational complexity is low and easy to implement. The simulation results show that this method can accurately judge the success or failure of random demodulator compression sampling reconstruction, and can effectively reduce the probability of interference to the primary user when the signal is not sparse in wideband spectrum sensing.