相移多波束形成的FPGA实现  

FPGA Implementation of Phase-shift Multi-beam Forming

作　　者：牛晓扬 王东辉[1] NIU Xiaoyang;WANG Donghui(Key Laboratory of Information Technology for Autonomous Underwater Vehicles,Institute of Acoustics,Chinese Academy of Sciences,Bejing,100190,China;University of Chinese Academy of Science,Beijing,100049,China)

机构地区：[1]中国科学院声学研究所水下航行器信息技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《网络新媒体技术》2020年第4期51-57,共7页Network New Media Technology

基　　金：中国科学院声学研究所青年英才计划项目(编号:QNYC201622)。

摘　　要：研究了基于FFT的相移多波束形成算法在FPGA中的实现。其具体实现结构包括AD采样、数字混频、低通滤波和FFT变换四个部分。针对在相移多波束形成中采用传统滤波器存在速度和资源消耗相矛盾的问题,提出在设计滤波器时采用基于多相分解的FIR滤波器设计方法,并对整个波束形成结构进行了优化。相比于采用传统FIR滤波器实现多波束形成算法,优化后的结构能够有效降低资源消耗。The main work of this paper is to research how to implement the FFT-based phase-shift multi-beam forming algorithm in FPGA.Primary implementation method includes AD sampling,digital mixing,low-pass filtering and FFT transform.Because of the contradiction between speed and resource consumption when traditional filter is employed in phase-shift multi-beam forming designation,this paper proposed to use the filter structure based on the technology of multi-phase decomposition and optimized the whole structure.Compared with traditional FIR filter,using this technology can reduce the resource consumption effectively.

关 键 词：相移多波束 FPGA FIR滤波器 多相分解 

分 类 号：TN911.7[电子电信—通信与信息系统] TN791[电子电信—信息与通信工程]