高速超宽带系统中频谱优化方法的研究  

Research on spectral optimization in high data rate UWB system

作　　者：戚银城[1] 翟剑[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2009年第5期93-98,共6页Journal of North China Electric Power University：Natural Science Edition

摘　　要：脉冲波形设计和频谱控制是超宽带通信系统解决频谱共存和相互干扰问题的关键。提出了基于最小面积准则(LAC)的频谱优化方法,并将其应用在正交脉冲调制超宽带系统中。该系统由多条并行发送支路组成,每条支路利用正交脉冲进行脉冲位置调制(PPM)与脉冲形状调制(PSM)相结合的调制。仿真结果表明:利用LAC优化的结果和最小均方误差准则(MMSE)相比更符合FCC的要求,不仅能提高频谱利用率,还能实现对频谱的灵活控制。Pulse waveform design and spectral control is the key to solve the problems of spectrum coexistence and interferer. In this paper, a spectrum optimization method based on Least Area Criterion （LAC） was proposed, and applied this method in orthogonal pulses modulation UWB system. The system consists of several parallel transmitting branches, and the orthogonal pulses were modulated by PPM and PSM in each branch. Simulation results demonstrate that the spectrum optimization performance by LAC meets the requirement of FOE spectral mask strictly compared with minimum mean square error （MMSE）. It can not only enhance the utilization of spectrum, but also control the spectrum flexibly.

关 键 词：超宽带(UWB) 频谱优化 脉冲组合 

分 类 号：TN914[电子电信—通信与信息系统]