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.
出处
《通信技术》
2010年第7期1-4,共4页
Communications Technology
