作　　者： ; ; ;

机构地区： 东南大学信息科学与工程学院移动通信国家重点实验室

出　　处： 《电子与信息学报》 2005年第9期1437-1440,共4页

摘　　要： 该文在现有的OFDM系统联合迭代信道估计与符号检测算法的基础上,根据信道响应的时域相关性,将预测方法引入迭代信道估计,对其进行改进。提出一类基于对初始信道估计值进行预测的迭代信道估计算法。进而分别用两种预测方法进行仿真并与传统迭代算法进行比较。仿真结果表明:该方法与传统算法相比,加快了迭代收敛速度,降低了系统误码率。在复杂度增加不大的前提下,提高了系统性能。 In this paper, an iterative joint channel-estimation and symbol-detection algorithm based on prediction is presented for orthogonal frequency-division multiplexing systems. Considering the correlation between impulse responses, the prediction method is introduced into the iterative channel estimation. The initial channel value of iterative estimation is predicted in each symbol. Several prediction methods are simulated and compared. The simulation results show that contrasted to the conventional scheme the proposed algorithm improves the convergence capability and system performance dramatically.

关 键 词： 正交频分复用 信道估计 迭代 预测

领　　域： [电子电信] [电子电信]