基于正交小波的超宽带无线通信多址接入方式——波分多址  

Waveform Division Multiple Access Based on the Orthogonal Wavelet for Ultra-Wideband Impulse Radio Multiple-Access Communication

作　　者：朱雪田[1] 邓天乐[1] 周正[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2004年第4期13-17,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：教育部科学技术研究重点项目(03035);国家"863计划"项目(2003AA123240);国家自然科学基金项目(60372097)

摘　　要：与传统的通信技术相比较,超宽带(UWB)通信系统在信号波形选择方面具有更大的灵活性.基于正交小波理论,一种新的UWB多址接入方式——波分多址(WDMA)被提出.在这种多址接入方式中,具有正交性的尺度函数(t)与小波函数ψ(t)波形被设计作为UWB脉冲波形,借助m序列理论,将2种函数波形均匀地分配给多个用户以实现多址接入.性能分析及仿真比较表明,与传统的TH-PPM和DS-BPMUWB多址系统相比较,WDMAUWB系统用户容量显著提高.A new ultra-wideband (UWB) multiple-access scheme, waveform division multiple access (WDMA) based on the orthogonal wavelet function shapes, is presented. In this new scheme, the scaling function (t) and the wavelet function ψ(t) are designed as UWB pulses, which are uniformly distributed to the users to realize multiple access. Theoretical analysis and simulation results show that our WDMA UWB system has larger capacity than the traditional TH-PPM((time)hopping-pulse position modulation ) and DS-BPM(direct sequence-bi-polarity modulation).

关 键 词：超宽带 波分多址 正交小波 多址接入 

分 类 号：TN914.3[电子电信—通信与信息系统]