TDMA网络的FH-OFDM同步算法研究  

Study on FH-OFDM Synchronization Algorithm in TDMA Network

作　　者：郑志国[1,2] 张元铜[1,3] 沈晓东[1,4] 汤叔祺[5] 

机构地区：[1]清华大学电子工程系,北京100084 [2]总参通信部驻广州地区军事代表室,广东广州510500 [3]重庆通信学院,重庆400035 [4]总参通信部驻郑州地区军事代表室,河南鹤壁458000 [5]电子工业部第7研究所,广东广州510310

出　　处：《通信技术》2010年第7期1-4,共4页Communications Technology

摘　　要：首先对比了FH-OFDM(跳频OFDM)两种组成形式的优缺点,据此选择了其中一种形式构建了TDMA网络的FH-OFDM的系统模型;然后分别讨论了该系统中跳频同步、时分多址(TDMA)网同步和正交频分复用(OFDM)同步的算法以及三者之间的关系;并对OFDM同步算法进行了深入讨论,构造了基于数据辅助估计的FH-OFDM跳帧结构;利用短训练符号进行了OFDM同步的Matlab仿真,分析了影响频偏估计的因素,并提出了一种工程上选择训练符号的参考方法。This paper first presents the three forms of frequency-hopping OFDM,analyzes their advantages and disadvantages.On this basis,one form is chosen to build up the FH-OFDM system model of TDMA network.Then the algorithms of frequency-hopping synchronization,TDMA network synchronization and OFDM synchronization are discussed,including the relationship among these three.The OFDM synchronization algorithm is emphatically studied,and the FH-OFDM frame based on data support also constructed.By using the short training symbols,the simulation of synchronization algorithm is done by means of Matlab.Meanwhile,this paper also analyzes the impact of different training symbols on frequency offset estimation,proposes a reference method for project choice of training symbols.

关 键 词：FH-OFDM 训练符号 定时同步 频偏估计 TOD TDMA 

分 类 号：TN911.7[电子电信—通信与信息系统]