【摘要】 用改进后的多重信号分类(MUSIC)方法估计直接序列扩频 超宽带(DS UWB)系统的时延.将脉冲处理增益引入UWB系统,并把每个用户的其他多径信号归入噪声子空间处理,以利于对主径信号进行准确的时延估计,同时也改善了MUSIC方法中对用户数的限制.在UWB室内路径损耗模型下,比较了相关接收机(Correlator)和多重信号分类(MUSIC)2种方法的多用户、主径信号的时延估计结果.更多还原

【Abstract】 An improved multiple signal classification(MUSIC) method is used to estimate the propagation delay in direct-sequence spread ultra-wideband(DS-UWB) system. By introducing pulse processing gain into the UWB system and regarding the signal of other multipath as a part of the noise subspace, the delay of mainpath signal can be accurately estimated. Meanwhile the limitation on the number of users in normal MUSIC method is improved. Based on the model of UWB indoor path loss, the delay estimations of mainpath signal in the multi-user environment obtained with Correlator and MUSIC methods are also compared.更多还原