采用椭球波脉冲的多波段超宽带性能研究  

Research on the performance of the multiband impulse radio UWB communication system based on PSWF

作　　者：陈丽丽[1] 于欣[1] 窦峥[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2014年第4期499-503,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(61201237);黑龙江省自然科学基金资助项目(QC2012C069)

摘　　要：为了提高信息传输速率、灵活利用频谱,从多波段脉冲超宽带(multiband impulse radio UWB,MB-IR-UWB)系统的工作原理出发,结合有限项扁长椭球波函数(prolate spheroidal wave function,PSWF)良好的带限和正交特性,提出了一种新的多波段频谱划分方式,在此基础上搭建系统模型。通过推导给出在高斯白噪声背景下,采用TH-BPPM调制时的平均误比特率公式,并进行系统性能分析。仿真结果表明,在保证各波段间不干扰条件下,MB-IR-UWB与单波段UWB系统有相同的误码性能,PSWF脉冲可用于数据的并行传输,信息传输速率有大幅度提高。同时,脉冲持续时间影响系统的误码性能,Tm=6 ns是波段数N=15时对应的最佳脉冲持续时间。To improve the data transmission rate and to use spectrum more flexibly, on the basis of the operational theory of the multiband impulse radio UWB （ MB-IR-UWB） system, in combination with the excellent band-limited and orthogonal characteristics of the prolate spheroidal wave function （ PSWF） , a new multi-waveband spectrum al-location method was proposed in this paper. The system model was built and the mean bit error rate （ BER） formula was derived under additive white Gaussian noise and by applying binary time hopping pulse position modulation. Moreover, the system performance was analyzed via Matlab simulation. The results indicate that the MB-IR-UWB system has the same BER performance as the single-waveband UWB system under the condition of non-interference between different bands. The PSWF impulse can be used for the parallel transmission of data and the data transmis-sion rate will be significantly lifted. In addition, the PSWF pulse duration affects the BER performance of the sys-tem. Tm =6 ns is the best pulse duration for waveband number N =15.

关 键 词：脉冲超宽带 多波段 相干解调 脉冲持续时间 性能研究 

分 类 号：TN914.2[电子电信—通信与信息系统]