直接序列扩频数字匹配滤波器

Digital Matched Filters for DS/SS

探讨用于直接序列扩频的数字匹配滤波器（ＤＭＦ）的逻辑结构和有关参数的选取问题；讨论了采用并行处理技术和快速算法的可行性，分析了量化比特数、取样间隔以及Ａ／Ｄ变换器固有的软限幅效应对系统性能的影响；为有所比较，还提到了早期的极性重合ＤＭＦ。在给出部分理论分析和计算机模拟结果之后归纳了几条主要结论。

This paper focuses on selecting the structures and relevant parameters of digital matched filter (DMF) for DS/SS.The feasibility of using parallel processing techniques and fast algorithms is discussed.And the effects on DMF produced by quantization,sampling as well as the soft limitation of an A/D converter’s own are analysed.For the sake of comparison,polarity coincidence DMFs,they used to be employed,are introduced briefly.After some results of theoretical analysis and computer simulation are presented,several principal conclusions are drawn,which may be very useful in the designs of DMFs under the native condition at present.