摘要
复本相关器、复本相关积累器和分段复本相关器分别是理想信道、时间扩展信道和频率扩展信道的最佳似然比检测器。针对实际中信道扩展时间未知的问题 ,提出了一种简单的、易操作的估计目标回波时间扩展长度的方法 ,解决了复本相关积累器的严重失配问题 ,最后对该方法进行了仿真计算 。
Baggenstoss deemed that replica correlation integrator(RCI) is an optimal detector for TSD(time spreading distortion) channel . In our research, we found that for exploiting the full potential of RCI, we must overcome a serious lack of matching. Section 1 discusses the modeling of TSD channel(subsection 1.1) and the maximum likelihood detector for TSD channel(subsection 1.2). Section 2 proposes a multi hypothesis RCI that minimized lack of matching. Simulation results for a numerical example, given in Figs. 1 through 4, show preliminarily that this method for estimating spreading time of TSD channel with a proposed multi hypothesis RCI is simple, convenient, and feasible.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2002年第3期466-469,共4页
Journal of Northwestern Polytechnical University
