CDMA信号的联合参数估计

Joint Parameters Estimation for CDMA Signals

为了克服移动通信环境中信号在不同域(时间,频率,空间)的扩展对通信传输的影响,针对阵列信号处理技术中对信号波达方向(空间)、传输时延(时间)以及多普勒频移(频率)等参数进行联合检测和估计的方法,基于CDMA信号,采用传统的阵列信号高分辨技术,利用移动通信特有的空时频信道模型,提出一种能同时估计波达方向、信号传输时延和多普勒频移的联合算法,理论分析和计算机仿真结果验证了该算法的有效性,结果表明该算法结构简单,分辨率高,有较高的估计精度.

In wireless communications, mobiles emit signals that arrive at a receiver with multiple paths, each with its own direction of arrival （DOA）, path delay, fading, and Doppler shift frequency , which influence the quality of communication seriously. These parameters should be taken into account in array signal processing. Based on CDMA signal, a novel Space -Time approach is proposed to estimation the DOA, time delay, and the Doppler shift frequency. Because utilize special signal model about space - time - frequency of mobile communications. The proposed algorithm has simpler structure and high quality of division. The simulation results show the feasibility and effectiveness of the method.