优化混沌扩频序列的抗干扰性能分析  

Anti-jamming performance analysis of optimal chaotic spread spectrum sequences

作　　者：何世彪[1] 罗冬梅[1] 谷诚[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机应用》2010年第10期2843-2845,2849,共4页journal of Computer Applications

基　　金：重庆市科委自然科学基金资助项目(2007ba2017)

摘　　要：为了提高基于混沌序列的直序码分多址系统(DS/CDMA)抗干扰性能,提出一种优化混沌序列性能的优选算法,将得到的优化序列应用于DS/CDMA系统中,研究分别在加入单频干扰、部分频段干扰、脉冲干扰情况下的抗干扰性能。结果表明优化后的改进型Logistic映射混沌序列可利用的码数目众多,抗干扰能力强,且系统误码率较低,与Gold序列相比,在相同误码率情况(10-1)下,信噪比至少可改善2dB,更适合用于DS/CDMA系统和通信抗干扰技术中。In order to improve the anti-jamming performance of Direct Sequence/Code Division Multiple Access （ DS/ CDMA） system based on chaotic sequences, an optimization algorithm for choosing chaotic sequences was proposed. The optimal improved Logistic-map chaotic sequences were applied to DS/CDMA system, and the anti-jamming performances were studied under different kinds of jamming such as single-frequency interference, partial-band interference, and impulsive interference. The results show that the optimal improved Logistic-map chaotic sequences have larger capacity, excellent anti- jamming ability, and lower Bit Error Rate （BER）. Compared with the Gold sequence, with the same BER, SNR can be improved at least 2 dB, so they are more suitable for DS/CDMA system and anti-jamming technology.

关 键 词：混沌序列 直序码分多址 抗干扰 优选算法 误码率 

分 类 号：TN914.53[电子电信—通信与信息系统]