基于MIMO技术的DCSK通信方案的性能分析  

Performance analysis of DCSK communication scheme based on MIMO technology

作　　者：何世彪[1] 韩彦净[1] 张青[1] 杨迷[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机工程与应用》2014年第13期109-113,共5页Computer Engineering and Applications

基　　金：重庆市科委自然科学基金计划资助项目(No.2007ba2017)

摘　　要：MIMO技术在不增加信号带宽和发射功率的情况下,通过在发送端和接收端分别使用多个发送天线和接收天线来抑制信道衰落和噪声。利用MIMO技术的优势,设计了一种基于差分混沌键控(DCSK)的MIMO-DCSK混沌通信方案。针对这一方案,通过进一步的数学推导,得到系统在高斯信道下的理论误码率公式,并在MATLAB环境中进行了仿真验证。理论分析和仿真结果表明:在相同的信噪比条件下,MIMO-DCSK混沌通信系统的误码率比传统DCSK通信系统要小得多。因此,MIMO-DCSK混沌通信方案能够有效改善混沌通信系统的误码性能。Without the extra expenses of signal bandwidth and transmitter power, Multiple Input Multiple Output（MIMO） technology can suppress the channel fading and noise utilizing multiple antennas at both the sender and the receiver. Taking advantage of MIMO technology, a so-called MIMO-DCSK chaotic communication scheme has been proposed and imple-mented based on Differential Chaos Shift Keying（DCSK）. In view of this scheme, the present work is able to obtain the analytical Bit Error Rate（BER）expression through advanced mathematical derivation. The analytical results have been latter validated by simulation in MATLAB. Theoretical analysis and simulation results show that under the same Signal to Noise Ratio（SNR）, the BER of the MIMO-DCSK communication scheme is much smaller compared to that of the tradi-tional DCSK modulation scheme. Therefore, the MIMO-DCSK communication scheme can effectively improve the BER performance of the chaotic communication system.

关 键 词：MIMO技术 差分混沌键控 混沌通信 误码率 

分 类 号：TN914.4[电子电信—通信与信息系统]