火控雷达技术
火控雷達技術
화공뢰체기술
FIRE CONTROL RADAR TECHNOLOGY
2011年
4期
51-55
,共5页
邓岚%康怀祺%李宏波%鄢林
鄧嵐%康懷祺%李宏波%鄢林
산람%강부기%리굉파%언림
多相滤波%分布式算法%DDC%FPGA
多相濾波%分佈式算法%DDC%FPGA
다상려파%분포식산법%DDC%FPGA
polyphase filter%distributed algorithm%DDC%FPGA
为了实现机载雷达数据记录仪对宽带雷达回波信号的实时存储，提出了一种基于FPGA的宽带中频信号数字下变频结构。讨论了多相滤波正交化和分布式算法的基本原理，给出了宽带中频信号数字下变频的实现方案，重点对结构中正交化和抽取滤波两个模块进行了分析设计。Matlab仿真结果和FPGA仿真结果表明：该宽带中频信号数字下变频结构具有可行性，其资源占用率小，处理延时短，能满足实时处理的要求。
為瞭實現機載雷達數據記錄儀對寬帶雷達迴波信號的實時存儲，提齣瞭一種基于FPGA的寬帶中頻信號數字下變頻結構。討論瞭多相濾波正交化和分佈式算法的基本原理，給齣瞭寬帶中頻信號數字下變頻的實現方案，重點對結構中正交化和抽取濾波兩箇模塊進行瞭分析設計。Matlab倣真結果和FPGA倣真結果錶明：該寬帶中頻信號數字下變頻結構具有可行性，其資源佔用率小，處理延時短，能滿足實時處理的要求。
위료실현궤재뢰체수거기록의대관대뢰체회파신호적실시존저，제출료일충기우FPGA적관대중빈신호수자하변빈결구。토론료다상려파정교화화분포식산법적기본원리，급출료관대중빈신호수자하변빈적실현방안，중점대결구중정교화화추취려파량개모괴진행료분석설계。Matlab방진결과화FPGA방진결과표명：해관대중빈신호수자하변빈결구구유가행성，기자원점용솔소，처리연시단，능만족실시처리적요구。
For implementing real - time storage of wideband radar echo signal in airborne radar data recorder, the architecture of wideband IF signal digital down-converting （DDC） based on FPGA is proposed. The basic principle of quadrature polyphase filtering and distributed algorithm is discussed and the implementation project of wideband IF signal DDC is given. Two modules of the orthogonalization and extraction filtering are mainly analyzed and designed. The simulation results based on Matlab and FPGA indicate that this IF signal DDC architecture is feasible, which can satisfy requirements of real-time processing because of low resource occupancy rate and short processing time delay.
