CDMA通信中匹配滤波器的应用

The Applications of Matched Filters in CDMA Communications

匹配滤波器因具有大的时间带宽积在扩频和CDMA通信中受到极大重视，不仅作为快速捕捉和RAKE分集等传统技术的最佳方案，在多用户检测、智能天线、多速率甚至软切换等方面也都能发挥其忧势。本文综述了匹配滤波器的原理、应用和发展演变历史，着重于快速捕捉和RAKE分集的实现，指出了存在的问题和一些新的应用。

Due to their large time-bandwidth product, matched filters have been attracting a lot of interests in spread-spectrum and CDMA communications since their concept was presented. Matched filters not only act as the best candidate forconstructing rapid acquisition and RAKE diversity schemes, but also are of great advantage to multi-user detection, adaptiveantenna array, multi-rate detection , etc. This paper gives a comprehensive survey of the principle, application anddevelopment of matched filters with the emphasis on implementing rapid acquisition and RAKE diversity. Some existingproblems and new applications are pointed out.