基于高速ECL數(shù)字電路的寬帶多模信號的產(chǎn)生和設計
THE DESIGN AND GENERATION OF MULTI-MODE WIDEBAND SIGNALS BASED ON HIGH SPEED ECL DIGITAL CIRCUITS
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摘要: 該文給出了一種基于高速ECL數(shù)字電路的寬帶多模信號產(chǎn)生系統(tǒng),并簡要介紹了線性調頻(LFM),非線性調頻(NLFM)信號產(chǎn)生系統(tǒng)的設計方法。該文實現(xiàn)系統(tǒng)的時鐘頻率為280MHz,可輸出帶寬70MHz以下的多種時寬的LFM,NLFM信號。實際測試結果表明,該寬帶信號產(chǎn)生系統(tǒng)輸出的諧波與雜散均小于-55dB,完全可以滿足工程應用的要求。Abstract: In this paper, a multi-mode signal generation system based on high speed ECL digital circuits is introduced. The method to design LFM and NLFM signal systems is also discussed. The implemented system working at clock frequency of 280MHz can output LFM and NLFM signals with different time duration and frequency bands within 70MHz. The measurement results of the system show that its performances of harmonic and spurious signals less than-55dB. It can meet the needs of practical engineering applications.
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林茂,柯有安,雷達信號理論,北京,國防工業(yè)出版,1984,115-127.[2]蔡英杰,向敬成,寬帶LFM、NLFM信號及其產(chǎn)生,系統(tǒng)工程與電子技術.1999,21(1),36-40.[3]楊斌,多信號脈沖壓縮系統(tǒng)及低旁辯處理方法研究,(博士論文),成都電子科技大學,1999. ［4］H.D.Griffiths,W,J.Bradford,Digital geeration of high time-bandwidth product linear FM waveforms for radar altimeters,IEEE Proc-F,1992,139(2),160-169. -
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