现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
17期
55-57,64
,共4页
多相滤波%数字正交变换%中频宽带信号%前端处理
多相濾波%數字正交變換%中頻寬帶信號%前耑處理
다상려파%수자정교변환%중빈관대신호%전단처리
poly-phase filtering%digital orthogonal transformation%medium-frequency broadband signal%front-end pro-cessing
针对目前成熟的模拟正交变换处理的信号大多属于窄带信号，而数字处理方法中的希尔伯特正交变换受到带宽限制，不能很好地应用于中频宽带信号的接收。提出应用多相滤波正交变换的方法实现中频频段宽带信号的接收前端处理。该方法可很好地解决宽带接收信号的数字下变频正交变换的问题，并且适合在FPGA上实现，应用于工程实时处理。
針對目前成熟的模擬正交變換處理的信號大多屬于窄帶信號，而數字處理方法中的希爾伯特正交變換受到帶寬限製，不能很好地應用于中頻寬帶信號的接收。提齣應用多相濾波正交變換的方法實現中頻頻段寬帶信號的接收前耑處理。該方法可很好地解決寬帶接收信號的數字下變頻正交變換的問題，併且適閤在FPGA上實現，應用于工程實時處理。
침대목전성숙적모의정교변환처리적신호대다속우착대신호，이수자처리방법중적희이백특정교변환수도대관한제，불능흔호지응용우중빈관대신호적접수。제출응용다상려파정교변환적방법실현중빈빈단관대신호적접수전단처리。해방법가흔호지해결관대접수신호적수자하변빈정교변환적문제，병차괄합재FPGA상실현，응용우공정실시처리。
Since the signals processed by present mature simulation orthogonal transformation technology mostly belong to the narrow band signal,and Hilbert orthogonal transformation in the digital processing method is limited by bandwidth and can't be used in reception of the medium-frequency broadband signal,the method of using the poly-phase filtering orthogonal transfor-mation to realize the receiving front-end processing of the medium-frequency broadband signal is proposed in this paper. This method is good for solving the problem of digital frequency conversion’s orthogonal transformation of broadband received signals and is suitable for implementation on FPGA and real-time processing in engineering.
