擴(kuò)頻碼快速捕獲的瞬時(shí)相關(guān)譜估計(jì)法
Realization of fast acquisition optimum receiver by instant correlation spectral estimation
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摘要: 該文提出了一種低信噪比大多普勒頻移條件下擴(kuò)頻碼快速捕獲的方法,該方法依據(jù)回波信號(hào)與本地?cái)U(kuò)頻碼瞬時(shí)相關(guān)譜上的顯著峰值的存在性判決信號(hào)的存在性,與前人的方法相比,該方法在簡(jiǎn)化了系統(tǒng)復(fù)雜性的同時(shí)保持了并行多通道最優(yōu)接收機(jī)的性能。Abstract: This paper presents a new method of fast code acquisition under low SNR, and large Doppler shift condition. The method gives decision base on the peak existence in the spectral of instant correlation between the local code and the zero-IF received signal. This scheme not only promises a performance as good as that of parallel channel optimum receiver but also has a much simpler structure.
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王飛雪,直接序列擴(kuò)頻信號(hào)的全數(shù)字式快速捕獲,[博士論文],國(guó)防科技大學(xué),1998,11.[2]王飛雪,郭桂榕,二相編碼信號(hào)分段相關(guān)-視頻積累檢測(cè)的最優(yōu)中頻積累時(shí)間,國(guó)防科技大學(xué)學(xué)報(bào),1999,21(1),71-75.[3]劉有恒,信號(hào)檢測(cè)與估計(jì),北京,人民郵電出版社,1989,150-153.[4]程玉平,趙普福,m-序列編碼連續(xù)波信號(hào)的Doppler補(bǔ)償,電子學(xué)報(bào),1993,21(6),40 45[5]朱近康,擴(kuò)展頻譜通信及其應(yīng)用,合肥,中國(guó)科技大學(xué)出版社,1993,1,118-129.[6]Bede Liu, Fred Mintzer, Calculation of narrow band spectra by direct decimation, IEEE Trans.on ASSP, 1978, ASSP-26(6), 529-534. -
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