摘要
该算法通过联合多个正交频分复用(OFDM,Orthogonal Frequency Division Multiplexing)符号对频率偏移进行盲估计。该算法不需要数据辅助,利用接收信号循环前缀的相关性,通过计算相同子信道所传数据的相位差,来实现信号的小数倍频偏估计。利用相邻OFDM符号中频域导频的延迟相关运算来实现整数倍频偏估计。仿真结果表明该算法估计精度高,适合实际信号的应用。
In combination of several OFDM symbols,a parameter estimation algorithm for the frequency offset of OFDM signal is proposed.This algorithm requires no training data,with the correlation of cyclic prefix of received signal,and by calculating the phase difference of data on the same sub-channel,implements the estimation of fractional frequency offset.And with close OFDM signals frequency frame delay correlation,the integral frequency offset could be estimated.Simulation results show that the proposed algorithm is of high estimation accuracy and could be applied in the synchronization of actual signals.
出处
《通信技术》
2011年第11期10-12,共3页
Communications Technology
关键词
联合相关
频率偏移
循环前缀
OFDM信号
combined correlation
frequency offset
cyclic prefix
OFDM signals
