摘要
通过理论分析和仿真研究了零相关码用于并行4路4相扩频通信系统的特性。结果表明在理想线性信道时,由于零相关码消除了各支路之间相互干扰,系统的误码特性与QPSK的理想误码特性十分接近。在非线性信道时,在放大器1 dB压缩点处,BER=10E-3对应的Eb/N0从6.8 dB恶化到8.05 dB;采用扩频码交错手段可以改善系统性能,交错后相同误码率对应的Eb/N0从6.8 dB只恶化到7.6 dB。
Performance of 4 parallel quaternary phase spread spectrum communication with zero correlation zone （ZCZ） code is investigated by theory analysis and simulation . The results show that for an ideal linear channel the BER of this system is close to the BER of ideal QPSK system due to parallel branches interference - free employing ZCZ code ; For nonlinear channel, in 1 dB gain compression of amplifier, the Eb/N0 deteriorate from 6.8 dB to 8.05 dB corresponding BER of 10E -3 . Performance of systems can be improved by offset spread code, the Eb/N0 deteriorate only from 6.8 dB to 7.6 dB employing offset method corresponding the same condition.
出处
《航空兵器》
2008年第4期23-25,55,共4页
Aero Weaponry
关键词
零相关码
并行扩频
复数扩频
交错
zero correlation zone code
parallel spread spectrum
complex spread spectrum
offset
