压缩感知宽带接收机设计及无杂散动态范围分析

Design and Spurious-free Dynamic Range Analysis of a Compressed Sensing Wideband Receiver

为了分析压缩感知宽带接收机的性能损失,明确其适用范围,设计了一种基于调制宽带转换器(MWC)结构的压缩感知宽带接收机,并针对该接收机的无杂散动态范围进行仿真分析和实验测量。仿真分析和实测结果表明,字典基之间非正交性将会导致接收机无杂散动态范围的严重损失,在1/2压缩采样率的条件下,接收机无杂散动态范围仅能达到7 d B左右,这将严重限制压缩感知宽带接收机在高动态范围要求环境下的应用。

In order to analyze the performance loss and application of compressed sensing wideband receiver,the design detail of a compressed sensing receiver is provided based on modulated wideband converter（MWC） structure. Simulations and experiments are performed to measure the spurious-free dynamic range（SFDR） of the receiver. The result shows the large SFDR loss of the receiver caused by the non-orthogonality of dictionary atoms. When compressed at the ratio of 1 / 2,the SFDR of the compressed sensing wideband receiver is about 7 dB,which will severely limit its application in high dynamic range requirements.