一種雙正弦信號的快速頻率測量方法
Fast Frequencies Measurement Method for Dual Sinusoidal Signals
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摘要: 信號頻率測量在雷達信號處理中起到重要的作用?；贒FT和自相關(guān)理論，該文提出了一種雙正弦信號頻率的快速估計方法。該方法先用DFT估計其中一個頻率及其幅度，以此頻率對信號解調(diào)并對消該頻率成分，最后利用自相關(guān)理論估計信號的頻差。計算機模擬證實了方法具有精度高、測頻速率快的特點。
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關(guān)鍵詞:
- 寬帶數(shù)字接收機; 雙正弦信號;快速測頻; 自相關(guān)處理
Abstract: The frequency measurement for dual signals is crucial in radar signal processing. A method, which realizes the fast frequency measurement for dual sinusoidal signals basing on DFT and autocorrelation theory, is given. Firstly, one frequency and its amplitude are determined by DFT, with which to demodulate the signals and eliminate the corresponding component. Then, the gap of the two frequencies is estimated using the autocorrelation theory. Computer simulation confirms that the method is of high precision and fast frequency measurement. -
Tsui J. Digital Techniques for Wideband Receivers. USA: Artech House, Inc, 2002: 5-9.[2]Marple S L. Digital Spectral Analysis with Applications. New Jersey: Prentice-Hall, 1987: 303-321.[3]郭徳淳, 張俊, 費元春. 一種數(shù)字偵察接收機的快速測頻方法.現(xiàn)代雷達, 2002, 24(4): 57-59.[4]Novak I. Statistical analysis of high-accuracy measurement of radio frequency carrier signals from DFT spectra. CPEM90 Digest Conference on Precision Electromagnetic Measurements, Ottawa, Canada, June 1990: 434-435.[5]姜大龍. 數(shù)字式接收機與信號處理中的幾個問題的研究. [碩士論文], 北京：北京航空航天大學學報, 2002: 45-48. -
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