基于高速ECL数字电路的宽带多模信号的产生和设计
THE DESIGN AND GENERATION OF MULTI-MODE WIDEBAND SIGNALS BASED ON HIGH SPEED ECL DIGITAL CIRCUITS
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摘要: 该文给出了一种基于高速ECL数字电路的宽带多模信号产生系统,并简要介绍了线性调频(LFM),非线性调频(NLFM)信号产生系统的设计方法。该文实现系统的时钟频率为280MHz,可输出带宽70MHz以下的多种时宽的LFM,NLFM信号。实际测试结果表明,该宽带信号产生系统输出的谐波与杂散均小于-55dB,完全可以满足工程应用的要求。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,雷达信号理论,北京,国防工业出版,1984,115-127.[2]蔡英杰,向敬成,宽带LFM、NLFM信号及其产生,系统工程与电子技术.1999,21(1),36-40.[3]杨斌,多信号脉冲压缩系统及低旁辩处理方法研究,(博士论文),成都电子科技大学,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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