稀疏多带信号的压缩采样技术的研究

Compression Sampling Technology for Sparse Multiband Signals

实现宽带压缩采样的结构有多种类型,在分析调制宽带转换器的采样结构的原理的基础上,针对稀疏多带信号的压缩采样,搭建了四通道的宽带压缩采样系统的原型系统平台,其中,混频调制信号是现场可编程门阵列硬件电路产生的序列。采用稀疏多频带信号作为系统的输入测试信号,并且利用另一已知的稀疏多带信号作为系统的同步信号,对宽带压缩采样原型系统进行系统仿真。该系统中的混频调制信号容易生成、实现结构简单、参数设置灵活。软件仿真及硬件测试,验证了该宽带压缩采样系统的硬件平台的正确性和可行性。

There are several classic sampling structures for realizing the broadband compressive sampling. Based on analysis of the sampling principle of modulated wideband converter, the platform of wideband compressive sampling prototype system for sparse multiband signals is estabhshed. The modulation signal in this prototype system platform is generated by hardware circuit of field programmable gate array. Two kinds of sparse muhiband signals are regarded as the testing signal and synchronous signal respectively in order to simulate this system platform. In addition, the modulation signals in this system are easy in gener- ation, simple in structure and flexible in parameter setting. Software simulation and hardware testing verify the correctness and feasibility of this prototype sampling system.