压缩感知宽带接收机设计及无杂散动态范围分析

摘要

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 dB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 receiv-er,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-orthogo-nality of dictionary atoms. When compressed at the ratio of 1/2,the SFDR of the compressed sensing wide-band receiver is about 7 dB,which will severely limit its application in high dynamic range requirements.