摘要
为了提高混沌通信的可靠性,提出多输入单输出相关延迟键控(MISO-CDSK),并且推导出该方案基于瑞利衰落信道的误码率公式。通过在发射端设置多根独立的天线,该方案能够克服信道衰落问题。理论分析和仿真表明:与CDSK相比,MISO-CDSK误码性能更好;对于给定的平均信道增益,该方案误码率随着Eb/N0值的增加而降低;对于给定的Eb/N0值,该方案误码率随着平均信道增益的增加而降低;对于不同的Eb/N0值,选择合理的扩频因子能够实现该方案误码性能最优化。
To improve the reliability of chaotic communications,a multiple-input-single-output correlationdelay-shift-keying（CDSK） （MISO-CDSK） is proposed.The expression for bit error rate （BER） over rayleigh fading channels is derived by this scheme.By setting multiple independent antennas at the transmitter,the scheme can combat the problem of channel fading.Theoretical analysis and simulation results show that thescheme has better BER performance than that of CDSK.Given the average channel gain,the BER of the scheme decreases inversely with the value of Eb/N0.Given the value of Eb/N0,BER of the scheme decreases inversely with the average channel gain.For the varying of Eb/N0,the optimal BER of the scheme is obtained by selecting a reasonable spreading factor.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2014年第3期16-22,共7页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(60874091)
江苏省"六大人才高峰"高层次人才项目(SJ209006)
高等学校博士点专项科研基金(20103223110003)资助项目
关键词
多输入单输出
CDSK
瑞利衰落信道
扩频因子
multiple input single output
correlation-delay-shift-keying（CDSK）
rayleigh fading channel
spreading factor
