摘要
分析了超宽带(ultra-wideband,UWB)通信系统在信道同时存在多径、多址干扰,及加性白噪声条件下的相干解调性能,给出了TH-PPM调制在高斯近似下的相干解调BER(bit error rate)解析公式,分析了采用SRake接收下的BER性能,给出了解析表达式.为验证解析式的有效性,对比了系统仿真与解析数值计算的结果.并通过IEEE多径信道模型CM1～CM4、Rake插指数、不同的多址用户数等方面,详细分析和计算了TH-PPM的BER性能,给出了性能曲线.获得的结果为UWB室内高速多址通信系统的设计提供了依据.
The ultra-wideband （UWB） time-hopping pulse position modulation performance is analyzed under multipath and multiple access channel model which is similar to the real condition. An analytic expression of bit error rate （BER） for commonly coherent demodulation is presented, furthermore, that of BER for select rake demodulation are derived also. Multipath and multiple access interference are assumed as a zero mean Gaussian process which is proved to be reasonable by comparing with the simulation results. Some parameters impacting the performance are evaluated in standardized UWB indoor channel model by IEEE, including power delay profile （PDP） of channel and the number of fingers in select rake receiver.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2005年第10期1676-1680,共5页
Systems Engineering and Electronics
基金
国家自然科学基金资助课题(60372037)
关键词
超宽带
时跳脉位调制
多径干扰
多址干扰
RAKE接收机
ultra-wideband
time-hopping pulse position modulation
multipath interference
multiple access interference
rake receiver
