基于二元星座映射的LTE无线网络信号接收算法

摘要

为解决LTE无线网络信号接收算法难以消除莱斯噪声干扰,致使信号接收过程中信道抖动严重,以及信号追踪精度不高等难题,提出基于二元星座接收映射机制的LTE无线网络信号接收算法.以中央基站为中心,根据LTE网络节点与中央基站之间的拓扑距离关系,设计小区基站接收结构,消除法线方向上的接收错位现象;根据时延的高低,以信号发射节点为中心,按层级将中央基站接收天线进行层次排列,组建节点接收结构,消除切线方向上的接收错位现象,定义相应的映射规则,将节点-小区基站接收结构进行映射,构建二元星座接收映射机制,减缓信道抖动;根据单个信号传输质量高低,构建节点信号质量分组传输机制,提高信号接收质量.仿真结果表明,与IQRA算法、MNPF-HMA算法相比,所提算法的信道抖动时间更短,信道传输质量与信号发射源定位精度更高.%To solve these defects such as serious channel jitter and low signal tracking accuracy induced by difficultly eliminating Rice noise interference in current LTE wireless network signal receiving algorithm,the LTE wireless network signal receiving method based on two element constellation receiving mapping mechanism was proposed.The cell base station receiving structure was designed according to the topological distance between the LTE network node and the central base station to eliminate the normal direction of the reception of the dislocation phenomenon.According to the level of time delay,taking the signal transmitting node as the center,hierarchical arrangement of the central base station receiving antenna was done according to hierarchy to eliminate the receiving dislocation in the tangential direction.A node receiving structure was established,and the corresponding mapping rules were defined to map the node-cell base station receiving structure,and the two element constellation reception mapping mechanism was constructed for slowing down the channel jitter.The node signal quality packet transmission mechafism was constructed according to the quality of single signal transmission for improving the quality of signal reception.Simulation re suits show that this algorithm has less channel jitter time,higher precision of channel transmission quality and signal emission source location compared with the IQRA algorithm and MNPF-HMA algorithm.