為解決現(xiàn)代電子戰(zhàn)對接收機(jī)處理帶寬寬、靈敏度高及實(shí)時性處理的要求，提出一種數(shù)字信道化接收機(jī)的設(shè)計方法。在推導(dǎo)高效信道化接收機(jī)模型的基礎(chǔ)上，采用多相濾波器結(jié)構(gòu)實(shí)現(xiàn)的數(shù)字信道化接收機(jī)。該接收機(jī)利用超高速A/D對數(shù)據(jù)進(jìn)行高速采樣，然后由高性能FPGA進(jìn)行數(shù)據(jù)抽取、多相濾波、CORDIC算法等信道化實(shí)時處理。為了提高實(shí)時性，采用并行IFFT實(shí)現(xiàn)。該信道化接收機(jī)不僅能穩(wěn)定輸出載頻及相位信息，還能處理三路同時到達(dá)的不同信號。實(shí)際的性能測試結(jié)果表明該接收機(jī)的功能正確并達(dá)到預(yù)定指標(biāo)。

Abstract:

?To meet requirements of the modern electronic warfare on the wide receiver processing bandwidth， high sensitivity and real-time processing，a digital channelized receiver design was proposed. Based on the derivation of efficient channel receiver model，polyphase filter structure wa adopted to realize digital channelized receiver. The high-speed A/D was used for data acquisition，and high-performance FPGA exceeded the channel real-time processing such as data extraction， polyphase filter， and CORDIC algorithms. In order to improve real-time， parallel IFFT was implemented. The receiver not only could steadily output the frequency and phase information，but also could deal with three different ways signals which arrived at the same time. The actual performance results show that the receiver has correct function and hits the intended target.

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