摘要
提出了一种基于信道估计自相关函数的多普勒频移估计算法。在OFDM符号数据段前插入正交可变扩频因子(OVSF)序列,求出时域的信道冲激响应,利用信道冲激响应的自相关实现多普勒频移估计。仿真结果表明,该算法可以在较大多普勒频移范围内有效地估计出多普勒频移。
A channel auto-correlation function algorithm is proposed for Doppler spread estimation.The OVSF is inserted into OFDM symbols to find the auto-correlation function of time domain channel estimates and then estimate the Doppler spread.Simulation results show that the proposed Doppler spread estimator can provide high estimation accuracy for a wide range of Doppler spread.
出处
《电子科技》
2011年第6期1-3,共3页
Electronic Science and Technology
