改进型DCSK多址接入方案及其性能分析  

Performance of modified multiple access scheme for DCSK

作　　者：周毅刚[1] 时颖[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001

出　　处：《通信学报》2008年第4期136-140,共5页Journal on Communications

摘　　要：在对TLMA-DCSK多址接入方案进行分析的基础上,提出了一种改进的TLMA-DCSK多址接入方案。在改进方案中,信道中各用户的参考信号占用不同时隙,相互无干扰,而数据信号叠加传输。在高斯白噪声信道和多径瑞利衰落信道中分别对改进方案进行误码性能分析,并与原方案比较。理论分析及仿真实验表明改进方案改善了系统性能。Based on the time-delay-based multiple access DCSK, a modified TLMA-DCSK scheme was proposed. In the modified scheme, to reduce excessive interference, the reference samples occupied the different slots for different users, but the data samples occupied the same slots for all users. To compare with TLMA-DCSK, the performance was evaluated in terms of the bit error rate （BER） under AGWN channel model and multipath Rayleigh fading channel model. Theoretic analysis and simulation results show that the proposed scheme is better than TLMA-DCSK in BER.

关 键 词：混沌通信 DCSK 多址 瑞利衰落 

分 类 号：TN914.3[电子电信—通信与信息系统]