DMB-T传输系统中扩频码快速捕获研究

Study on Rapid Acquisition of Spread Spectrum Code in DMB-T Transmission System

讨论了DMB-T传输系统中基于匹配滤波器的扩频码快速捕获算法,针对传统匹配滤波器占用硬件资源大的缺点,提出了一种新的多停顿捕获方案。新方案在匹配滤波器结构和算法上进行了优化,在原有硬件规模的基础上扩充了系统的捕获验证功能,降低了虚警概率,缩短了捕获时间。结合同步捕获系统框图分析了各个模块的功能和实现方法,并通过Modelsim仿真和FPGA硬件平台测试,验证了方案的可行性和先进性。

This paper proposes a novel multiple-dwell acquisition scheme based on digital matched filter (DMF)for rapid acquisition of PN sequences in DMB-T transmission system. Since the realization of conventional DMF requires very complex hardware resource, structure and algorithm are optimized in the proposed scheme, in which the verification function of the system is expanded on the basis of original hardware resource. Thus the new design, as compared with conventional DMF, can more effectively reduce the false a...