偽碼-載波調(diào)頻偵察信號識別的譜相關方法(Ⅱ)偽碼-載波調(diào)頻信號的調(diào)制識別和參數(shù)估計
Reconnaissance Signal Recognition of PN Code-Carrier FM Based on Spectral Correlation Method(II)The Modulation Recognition and Parameter Estimation of PN Code-Carrier FM
-
摘要: 研究了偽碼-載波調(diào)頻偵察信號識別的譜相關方法,具體針對偽隨機二相編碼(PRBC)信號及其與正弦調(diào)頻和線性調(diào)頻復合信號作了研究。通過3種復合信號循環(huán)譜截面譜相關特征的分析和提取,完成了調(diào)制類型的自動識別,估計了載頻和載波調(diào)頻參數(shù),對偽隨機碼信號的各項參數(shù)進行了估計。分析了噪聲環(huán)境和有限采集時間對參數(shù)估計的影響,最后對調(diào)制識別和參數(shù)估計進行仿真分析,表明了譜相關方法在偽碼-載波調(diào)頻信號識別中的優(yōu)勢。Abstract: The reconnaissance signal recogniton of PN code-carrier FM based on Spectral Correlation (SC) method is studied, especially for Pseudo-Randorm Bi-phace Code (PRBC), SFM-PRBC and LFM-PRBC. Based on the character-extraction and analysis of the a-section of SC, the auto-classification of modulation class is investigated, and the carrier frequency and the parameter of FM are estimated. Further, the parameter of PN code are estimated. The influence of the noise and the limited-time of sampling is analyzed. Finally, the simulation shows the advantage of SC in the recognition of reconnaissance signal.
-
Gini F, Giannakis G B. Frequency offset and timing estimation in slowly varying fading channels: A cyclostation-ary approach [J].IEEE Trans. on Comm., 1998, COM-46 (3): 400-411.[2]Serpedin E, Giannakis G B, et al.. Blind joint estimation of carrier frequency offset and channel using non-redundant periodic modulation procedures[A]. Statistical Signal and Array Processing, 1998, Proceedings Ninth IEEE SP Workshop [C],1998:288-291.[3]Mazzenga F, Vatalaro F. Parameter estimation in CDMA multiuser detection using cyclostationary statistics[J].Electronics Letters.1996, 32 (2):179-181[4]Chin-Kang C, Gardner W A. Signal-selective time-differenceof-arrival estimation for passive location of man-made signal sources in highly corruptive environments, part Ⅱ: Algorithms and performance [J]. IEEE Trans. on SP, 1992, SP-40(5):1185-1197.[5]熊剛,趙惠昌,王李軍.偽碼-載波調(diào)頻偵察信號識別的譜相關方法(Ⅰ)偽碼-載波調(diào)頻信號的譜相關函數(shù).電子與信息學報,2004,27(7),1081-1086.[6]Gardner W A. Measurement of spectral correlation[J]. IEEE Trans. on ASSP, 1986, ASSP-34(5): 1111-1123.[7]羅利春著.無線電偵察信號分析與處理.北京:國防工業(yè)出版社,2003,1:64-70. -
計量
- 文章訪問數(shù): 2261
- HTML全文瀏覽量: 97
- PDF下載量: 736
- 被引次數(shù): 0
下載:
