摘要
宽带数字接收系统需要具有快速截获信号的能力,现有的商用数字信号处理器很难实时处理高速A/D变换器输出的大量数据。本文提出一种高效的结构,综合利用数字滤波器的灵活性和多相滤波的高效性,按照先抽取数据,再低通滤波、混频的顺序,较好地解决了硬件速度和高速数据流不匹配的问题。
The wide-band digital receiver is required to be able to intercept the signal quickly, but it is difficult that the digital signal processor in COTS processes the large number of data from high-speed A/D converter in real time. A kind of efficient architecture, which combines the flexibility of digital filter and the efficiency of poly-phase filters is presented. By decimating the data prior to filtering and mixing, this architecture gives a better solution to the mismatch between the lower hardware speed and high data rate.
