Blind estimation of direct-sequence spread spectrum m-sequence chip codes

被引:0
|
作者
Hill, PCJ [1 ]
Ridley, ME [1 ]
机构
[1] Cranfield Univ, Royal Mil Coll Sci, Dept Informat & Simulat, DoIS, Swindon SN6 8LA, Wilts, England
关键词
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暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The Massey algorithm for breaking cryptographic codes based on linear feedback shift register (LFSR) generators can also be used to detect pseudonoise (PN) chip-code sequences in direct-sequence spread spectrum (DS/SS) signals from short intercepted snapshots in low-noise channels. The algorithmic process has been extended in order to estimate DS/SS m-sequence codes of unknown order by solving for the LFSR tap sets over multiple windows using majority-vote logic. The effects on performance of random chip errors, digital modulation, and multiple code schemes, such as code-division (CDMA) and Gold sequences, have been investigated.
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收藏
页码:305 / 309
页数:5
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