摘要
针对OFDM系统中盲信道估计计算量大、收敛速度慢和估计精度低的缺点,以及传统信道估计方法的频带利用率低的缺陷,详细介绍了基于子空间分解的半盲信道估计方法。该方法利用接收信号的相关矩阵特性来估计信道,其是传输速率和收敛速度的折衷,通过Matlab软件仿真表明,此方法能较大地改善信道估计精度和降低系统的误差。仿真结果对信道估计问题的深入研究具有借鉴意义。
In OFDM system, as the blind channel estimation has deficiencies of large qualities of calculation, slow convergence rate and bad precision of estimation, and the traditional means has deficiency of weak utilization of the channel, the semi - blind channel estimation based on the subspace identification is introduced in details. The estimation, which employs characteristics of the matrix of received signal to estimate the channel,it is a balance between the data transportation efficiency and convergence rate. The emulation in Matlab software shows that the means can improve the precision of estimation and reduce NRMSE of the system for a certain extent. The simulation results may be of reference value for the further research on channel - estimation problem.
出处
《现代电子技术》
2010年第3期73-75,共3页
Modern Electronics Technique
