擴頻碼快速捕獲的瞬時相關(guān)譜估計法
Realization of fast acquisition optimum receiver by instant correlation spectral estimation
-
摘要: 該文提出了一種低信噪比大多普勒頻移條件下擴頻碼快速捕獲的方法,該方法依據(jù)回波信號與本地擴頻碼瞬時相關(guān)譜上的顯著峰值的存在性判決信號的存在性,與前人的方法相比,該方法在簡化了系統(tǒng)復雜性的同時保持了并行多通道最優(yōu)接收機的性能。
-
關(guān)鍵詞:
- 擴頻; 快捕; 瞬時相關(guān); 傅氏變換法; 譜估計法
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. -
王飛雪,直接序列擴頻信號的全數(shù)字式快速捕獲,[博士論文],國防科技大學,1998,11.[2]王飛雪,郭桂榕,二相編碼信號分段相關(guān)-視頻積累檢測的最優(yōu)中頻積累時間,國防科技大學學報,1999,21(1),71-75.[3]劉有恒,信號檢測與估計,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)波信號的Doppler補償,電子學報,1993,21(6),40 45[5]朱近康,擴展頻譜通信及其應用,合肥,中國科技大學出版社,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. -
計量
- 文章訪問數(shù): 2100
- HTML全文瀏覽量: 87
- PDF下載量: 420
- 被引次數(shù): 0
下載:
