伪码跟踪误差和码片内多径分量的联合估计

Pseudo-Random Code Tracking and Separation of Sub-Chip Multipath Components

对多径环境下的伪码跟踪误差和码片内多径分离作了一些探讨 ,给出一种联合估计方法。经分析发现 ,传统伪码跟踪环在多径信道下并不是最佳估计器 .接着在不考虑噪声的情况下 ,通过最小二乘估计多径信道的冲激响应 ,提出了一种简单的多径分量提取算法 ,实现了伪码跟踪误差和码片内多径分量的联合估计 ,给出了仿真结果。最后就噪声问题列出了基于凸集投影算法 (POCS)的解决方法。

Some researches about joint-estimation of pseudo-random code tracking and separation of sub-chip multipath components are carried out in presence of multipath interference for providing a feasible scheme. First, traditional code tracking theory is analyzed to be not applicable in multipath environment. Secondly, multipath channel pulse response is estimated without taking channel noise into account, and this kind of joint-estimation is realized, which is combined with a simple new algorithm for extracting multipath components. Finally, simulational results are demonstrated. Additionally, projection on convex sets (POCS) deconvolution technique is applied for integrality of the whole scheme.