引用本文: | 朱祥维,王梦丽,王飞雪,等.存在自干扰码时的短周期伪码截获技术[J].国防科技大学学报,2007,29(1):59-64.[点击复制] |
ZHU Xiangwei,WANG Mengli,WANG Feixue,et al.Short Period PN Code Capture Technique with Self-jamming Code[J].Journal of National University of Defense Technology,2007,29(1):59-64[点击复制] |
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存在自干扰码时的短周期伪码截获技术 |
朱祥维, 王梦丽, 王飞雪, 庄钊文 |
(国防科技大学 电子科学与工程学院,湖南 长沙 410073)
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摘要: |
针对伪码截获这一无线电侦察和导航战中的难题,从模式识别的角度研究存在自干扰码时的伪码截获问题。通过对干扰码的载波频率、相位等参数的估计和补偿,将自干扰码下的伪码截获问题转换为模式识别问题。结合伪码的周期性,采用二进制积累的方法大大降低了判决前所要求的信噪比,使得对扩频信号直接解调以截获伪码成为可能,改变了过去依靠大口径天线提高信噪比的方法。 |
关键词: 扩频 伪码截获 二进制积累 模式识别 导航战 |
DOI: |
投稿日期:2006-06-16 |
基金项目:国家部委资助项目(106010304);新世纪优秀人才支持计划项目 |
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Short Period PN Code Capture Technique with Self-jamming Code |
ZHU Xiangwei, WANG Mengli, WANG Feixue, ZHUANG Zhaowen |
(College of Electronic Science and Engineering , National Univ. of Defense Technology, Changsha 410073,China)
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Abstract: |
PN code capture is a difficult problem in radio reconnaissance and navigation warfare. The PN code capture under self-jamming code was studied from the point view of pattern recognition theory. The carrier frequency and phase of self-jamming code were estimated and compensated firstly. Thus the PN code capture was converted into pattern recognition problem. Combined with the periodicity of the short PN code, binary integration was introduced to reduce the SNR before decision, which made the direct demodulation of spread spectrum signals feasible without large diameter antenna. |
Keywords: spread spectrum PN code capture binary integration pattern recognition navigation warfare |
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