用蒙特卡羅計(jì)算機(jī)模擬法估算振蕩源不穩(wěn)定對(duì)信號(hào)處理的影響
ESTIMATION OF THE EFFECT OF OSCILLATOR INSTABILITIES ON SIGNAL PROCESSING BY MEANS OF MONTE CARLO COMPUTER SIMULATION
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摘要: 正 1.引言 一般文獻(xiàn)在討論如脈沖壓縮、合成孔徑等數(shù)字信號(hào)處理技術(shù)時(shí),都假定系統(tǒng)中的振蕩源是理想的,即認(rèn)為它不存在相位噪聲,因此不會(huì)對(duì)信號(hào)處理產(chǎn)生不良影響。這個(gè)假定當(dāng)然與實(shí)際情況有出入,因此有必要加以研究和修正。但振蕩起伏對(duì)信號(hào)處理的影響相當(dāng)復(fù)雜,很多情況難以利用經(jīng)典理論來解決。本文提出用蒙特卡羅計(jì)算機(jī)模擬法來估算這種影響,并以脈沖壓縮為例來闡述這一思想。振蕩源的相位噪聲譜密度則以常用
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關(guān)鍵詞:
Abstract: The majority of literatures dealing with digital signal processing ignore the effect of oscillator instabilities. This will in some cases lead to an inadmissible design mistake.In this paper, Monte Carlo computer simulation is used to estimate the effect of oscillator instabilities on signal processing. The key link of this method is generating high quality random number sequence simulating the phase noice of oscillator. The case of pulse compression performance is discussed as an example in order to clarify:(1) the effect of oscillator instabilities on pulse compression performance, and (2) the requirement of oscillator frequency stability when the tolerance of the system performance is known. Finally, some computer simulation examples are given which will provide as reference data for engineering designers. -
F.E. Nathanson, Radar Design Principle, McGraw-Hill Book Co., 1969, p, 495.[2]M. L. Skolnik著,謝卓等譯,雷達(dá)手冊(cè),第七分冊(cè),國(guó)防工業(yè)出版社,1974年,第7-120頁. -
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