一种基于时分的EBPSK多载波实现方式  

Realization method for EBPSK multi-carrier based on time-division

作　　者：张鹏[1] 吴乐南[1] 苗圃[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《东南大学学报（自然科学版）》2014年第2期227-231,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61271204)

摘　　要：为了实现扩展的二元相移键控(EBPSK)调制的多载波传输,提出了一种基于时分的EBPSK多载波实现方式.首先,利用叠加原理,通过观察冲击滤波器的输出波形,分析了多路EBPSK信号间干扰的原因;然后,给出了消除信号间干扰的具体思路,即将临道信号相对延迟,使各路载波的判决区域在时间上区分开,避免判决区域的碰撞;最后,通过仿真,对比了不同时间保护间隔下基于时分的EBPSK多载波与单载波的误码率性能.仿真结果表明,时间保护间隔为0时干扰较大,多载波的误码率性能较差.在合适的时间保护间隔下,多载波的误码率性能几乎与单载波一致.基于时分的EBPSK多载波实现方式能够有效消除各路EBPSK信号间的干扰,使得多路EBPSK信号同时传输且误码率性能损失不明显.In order to realize multi-carrier transmission of extended binary phase shift keying （EB-PSK）modulation,a realization method is proposed based on time-division.First,based on the su-perposition principle,the cause of interference among EBPSK multi-carrier signals is analyzed by ob-serving the output waveform of the impacting filter.Then,the detailed method for eliminating inter-nal channel interference is given;that is,the judgment areas of the EBPSK multi-carrier signals are separated by relatively delaying neighboring signals to avoid the collision of the judgment areas.Fi-nally,the bit error rate （BER）of the EBPSK multi-carrier based on time-division and that of the EBPSK single carrier are compared under different time guard intervals.The simulation results show that the internal channel interference is larger and the BER performance of EBPSK multi-carrier is worse when the time guard interval is zero.Under the proper time guard interval,the BER perform-ance of the EBPSK multi-carrier is almost the same as that of the EBPSK single carrier.The interfer-ence among the EBPSK multi-carrier signals can be effectively eliminated by the proposed realization method based on time-division,and the simultaneous transmission of several EBPSK multi-carrier signals can be achieved with little BER performance loss.

关 键 词：扩展的二元相移键控 冲击滤波器 时分 多载波 EXTENDED BINARY PHASE SHIFT keying (EBPSK) 

分 类 号：TN911.3[电子电信—通信与信息系统]