EBPSK脉冲调制系统的抗多径性能提升  

Improvement in Anti-multipath Performance of EBPSK Pulse Modulation System

作　　者：王明双[1] 吴乐南[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《无线电通信技术》2017年第3期43-45,84,共4页Radio Communications Technology

摘　　要：为提升扩展的二元相移键控(Extended Binary Phase Shift Keying,EBPSK)脉冲调制通信系统的抗多径能力,提出了针对EBPSK脉冲调制波形特点的多径分离方法。在简要介绍EBPSK脉冲调制原理后,分析其调制参数与时延的关系,根据时延值设定相应的EBPSK脉冲调制参数,实现副径与主径的分离,从而消除副径对主径的影响;在此基础上,提出了利用副径能量的新型码元联合判决方法,提高了信噪比。系统仿真结果证明了该方法在多径信道下的有效性。A method of multipath separation based on the waveform characteristics of extended binary phase shift keying （EBPSK） pulse modulation is presented to mitigate muhipath effect. After a brief introduction to the principle of EBPSK pulse modulation, the relationship between the modulation parameters and time-delay is analyzed.The direct signal and muhipath signals are distinguished by selection of the EBPSK pulse modulation parameters according to the delay estimations; and then a joint decision method using the muhipath energy is applied to achieve extra signal-to-noise ratio（SNR） .The results of computer simulation show that this method is effective in multipath environments.

关 键 词：EBPSK 多径 时延估计 联合判决 

分 类 号：TN914.2[电子电信—通信与信息系统]