基于STBC技术的DCSK通信系统性能分析  

Performance analyze for STBC-based DCSK communication system

作　　者：赵雅琴[1] 李书营[1] 米雪龙 李元元[2] 吴芝路[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001 [2]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《系统工程与电子技术》2016年第1期155-162,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61102085)资助课题

摘　　要：差分混沌相移键控(differential chaos shift keying,DCSK)技术具有较好的抗噪声性能以及较低的检测复杂度,但是其传输速率比较低。为了提高其传输速率,提出了一种基于空时块码(space time block code,STBC)技术的DCSK通信系统。该系统充分利用了不同混沌信号之间具有较好的互相关性的特点,采用解码复杂度低的非相干解调技术,具有良好的抗噪声性能、不需要信道状态信息的优点。推导了在多径瑞利信道中STBCDCSK系统的误码率性能。大量的仿真实验结果表明,提出的STBC-DCSK系统在损失了微小的系统误码率性能的情况下,进一步提高了传输速率。Differential chaos shift keying（DCSK）has lots of advantages,such as anti-noise and low detection complexity,but it has a low transmission rate.In order to increase the transmission rate,a novel DCSK communication system based on the space time block code（STBC）technology is proposed.The proposed STBC-DCSK system,which makes good use of the cross-correlation property of chaos sequences,has the advantages of the DCSK system and does not require any channel state information.Moreover,the STBC-DCSK system increases the transmission rate and has lower detection complexity.The theoretical bit error rate（BER）performance is derived under multi-path Rayleigh fading channels.Numerous simulation results show that the proposed scheme enhances the transmission rate with a small BER performance sacrifice.

关 键 词：混沌通信 差分混沌相移键控 空时块码 信道状态信息 

分 类 号：TN929.533[电子电信—通信与信息系统]