基于正交PSWF的DS-BPSK多址调制方法  

A DS-BPSK Multiple-access Modulation Method Based on Orthogonal PSWF Pulses

作　　者：陈昭男[1] 王红星[1] 赵志勇[1] 张磊[1] 孙玮[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《无线电工程》2010年第9期19-21,41,共4页Radio Engineering

摘　　要：针对现有的多址超宽带系统中多用户干扰严重的问题,提出了一种使用正交椭圆球面波函数(PSWF)脉冲的直扩二进制移相键控(DS-BPSK)多址调制方法。该方法中每个用户使用的脉冲是相互正交的,当系统同步良好时,接收机可以完全消除多用户干扰,从而显著提高系统的误码率(BER)性能。同时,PSWF脉冲具有频谱灵活可控性,可使该系统满足美国联邦通讯委员会(FCC)频谱掩膜条件。仿真结果表明,与使用单一脉冲的DS-BPSK多址调制相比,该方法能有效降低系统BER,提高了系统的抗干扰能力。To overcome the severe multi-user interference of the current multiple-access UWB system, a multi-access system based on orthogonal PSWF pulses is proposed. Each user of the system is assigned an orthogonal PSWF pulse. When the chip synchronism is realized, the multiple-user interference can be completely eliminated and the BER performance of the system will be markedly improved. Meanwhile, the spectrum of PSWF pulse can be easily changed to make the system meet the FCC spectral requirement. The simulation results indicate that the proposed system has a lower BER than the conventional DS-BPSK system with the same pulse.

关 键 词：UWB PSWF 多址 DS-BPSK 

分 类 号：TN914.5[电子电信—通信与信息系统]