多径环境下UWB无线通信系统性能的比较研究

A Comparative Study on the Performances of UWB Systems under Multi-channel Environments

对超宽带无线TH-PPM和TH-PAM两种多址接入系统的多径性能做比较研究.通过理论分析与计算机仿真得出:1)在相同的多径干扰下,TH-PPM的误码率性能更好;2)当存在τ=ε时系统的性能急剧恶化;3)采用TH-PAM的超宽带无线电系统避免了对参数ε的选择;4)合理选择ε,可以提高TH-PPM系统多径性能.

The paper, on the base of a comparative study on the multi-path performances of multiple access input of Time Hopping Pulse Position Modulation （TH-PPM） and Time Hopping Pulse Amplitude Modulation （TH-PAM）, through theoretical analysis and computer simulation, has achieved the conclusions： 1） under the same multi-path interference, TH-PPM has a better performance in error rate; 2） when τ=ε , the performance of the system is worsening; 3） the application of TH-PAM ultra-wide band wireless system can fend off the choice of ε ; 4） a rational choice of ε can improve the multi-path performance of TH-PPM system.