摘要
为了得到更精确的迭代信道估计中的信道初始频响值,在基于二次曲线拟合预测的OFDM系统联合迭代信道估计与符号检测算法的基础上,提出一种基于MMSE准则的加窗线性预测方法对信道的初始频率响应值进行估计。仿真结果表明,在较高信噪比下,文中提出的基于MMSE准则的加窗线性预测的估计方法所得到的系统误码性能明显优于采用二次曲线拟合预测的信道估计方法。在复杂度增加不大的情况下,该方法是一种有效的改进算法。
In order to obtain more precise channel initial frequency response values for iterative channel estimation, an iterative joint channel estimation and symbol detection algorithm based on quadratic curve fitting prediction for OFDM systems is proposed. Upon it, a windowed linear prediction method under the MMSE law is presented for estimating the channel initial frequency response. Simulation results indicate that the performance of systems employing estimation method of windowed linear prediction based on MM...
出处
《通信技术》
2008年第5期13-15,共3页
Communications Technology
