基于IR-UWB密集多径信道的码片同步搜索方法性能分析

在脉冲超宽带（IR-UWB）系统中,脉冲时位同步对接收机的信号检测,保证通信的有效性和可靠性方面具有重要的作用.文献1]提出了五种基于Markov链模型的顺序搜索算法,给出了平均捕获时间公式.文献2]从集合论的数学分析方法论证了串行搜索中存在一种最优排列,同时得出此最优排列即为跳K搜索.本文对IR-UWB密集多径信道产生其接收脉冲信号的簇特性进行描述分析,同时采用蒙特卡罗仿真方法对文献1]给出的五种搜索算法的平均搜索捕获步数进行了性能仿真,分析仿真结果得出在未知信道参数时比特反转搜索算法所需的平均捕获时间性能最好.

An analysis of code Acquisition Algorithm in dense multipath Pulse IR-UWB channel

In IR-UWB system,signal acquisition are become more and more important to signal detect,and ensuring UWB communication more effective and reliable,The literature1]proposes five serial-search algorithms based on Markov model and gives the mean time formula of capturing.The literature2] demonstrate that it must be have a best permutation search strategy for UWB signal acquisition,and found the best one is;jump K search strategy.This paper describes the particular synchronization problem of pulse timing over frame perlod in UWB communications,the emulate the performance of those five search strategy by Monte Carlo emulation mode,and get a conclusiion that the bit reverse search strategy is the best in meaan acquisition time.