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首先提出差分编码器输入输出联合状态的概念,并设计出一种递归的网格图化简方法,实现了最大似然意义下的多符号联合差分检测.随后在此基础上,对衰落信道提出一种迭代检测结构,并将其应用于超宽带无线通信系统.仿真表明,在单位符号检测复杂度不变的前提下,检测性能可任意逼近多符号非相干差分检测的理论极限,并可有效地应用于实际通信系统中.同时它为各种类似的无记忆噪声中有限状态Markov过程的状态序列估计问题提供了一种新的解决方法.
Firstly, the concept of joint state of differential encoder is put forward, and a recursive mesh reduction method is designed to realize multi-symbol joint differential detection in the maximum likelihood.Furthermore, on this basis, the fading channel is proposed An iterative detection structure and its application in UWB wireless communication system.The simulation shows that the detection performance can be arbitrarily approximated to the theoretical limit of multi-symbol incoherent differential detection under the premise of unity symbol detection complexity, and it is effective It is also a new solution to the state sequence estimation problem of finite state Markov process in a variety of similar memoryless noises.