【摘要】 在复杂环境的超宽带通信系统中,信道估计的正确与否直接关系到接收机的性能。首先给出了一种基于Intel模型的时变信道仿真方法,以该超宽带时变信道为研究对象,提出一种基于TURBO原理和连续信道译码、结合训练比特的信道估计方法,能够直接估计本地接收模板,并跟踪信道的时变性。与先估计信道冲激响应,再重构模板信号的方法相比,大大简化了估计的过程。更多还原

【Abstract】 In the complicated UWB communication system,it is important that how to estimate channels that can influence directly the receiver performance.In this paper,a simple simulation model for the time variance of the UWB channel is proposed first.Then a channel estimate method is presented for the time variance channel,which is based on TURBO principle,continuous decoding algorithm and training sequences.Finally,the simulation results are given.They show that this method can estimate local receiving template directly as well as track time variations of the channel.Compared with the method of estimating channel impulse responses formerly and reconstructing the template single posteriorly,the process is greatly simplified.更多还原