基于随机解调器压缩采样的宽带频谱检测方法

宽带频谱检测的目的是完成对宽频段内信号的检测。在Nyquist采样理论下，为瞬时覆盖这么宽的带宽会对模数转换器（ADC，analog—to-digital）的采样率提出过高要求。研究了基于随机解调器压缩采样的宽带频谱检测方法。该方法能够以低于Nyquist采样率的速率完成对宽频段的采样，降低了ADC的负担。仿真结果表明，在频谱满足稀疏性的条件下，所研究的方法能够较准确检测宽频段内的各个信号。

Wideband Spectrum Sensing Based on Random Demodulator Compressed Sampling

Wideband spectrum sensing aims at detecting signals in a wide frequency range. Under Nyquist sampling framework, a very high sampling rate of analog-to-digital converter （ADC） is required in order to cover such a wide frequency range. A spectrum sensing method based on random demodulator compressed sampling is studied, which is capable of sampling a wide frequency range at sub-Nyquist rate, and therefore reducing the burden of ACD. Simulation results show that the method can detect signals in a wide frequency range when spectrum is sparse.