| 二维RAKE接收机中一种约束最小二乘信道矢量估计算法 |
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| 引用本文： | 王建明,赵春明.二维RAKE接收机中一种约束最小二乘信道矢量估计算法[J].东南大学学报,2003,19(1):1-4. |
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| 作者姓名： | 王建明 赵春明 |
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| 作者单位： | 东南大学移动通信国家重点实验室，南京210096 |
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| 基金项目： | The National Hi-Tech Development Plan (863-317-03-01-02-04-20). |
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| 摘 要： | 针对移动通信中目标方位变化比信道衰落变化慢的特点，首先利用子空间分解法估计出目标信号的导向矢量，并用估计出的导向矢量构造一个约束条件，然后用业务信号在约束最小二乘准则下估计信道失量，本用带投影的迭代最小二乘(ILSP)算法求解约束最小二乘问题，导频用于ILSP算法的初始化，通过ILSP算法的迭代过程，可以逐步提高信道矢量估计和符号检测的精度．仿真结果表明：与传统二维RAKE接收机相比，本提出的算法使系统的性能得到了有效改善．
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| 关 键 词： | 二维RAKE接收机 移动通信 子空间分解法 导向矢量 约束最小二乘 信道矢量估计 迭代最小二乘 |
Constrained least squares algorithm for channel vector estimation in 2-D RAKE receiver |
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| Wang Jianming,Zhao Chunming.Constrained least squares algorithm for channel vector estimation in 2-D RAKE receiver[J].Journal of Southeast University(English Edition),2003,19(1):1-4. |
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| Authors: | Wang Jianming Zhao Chunming |
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| Abstract: | Based on the fact that the variation of the direction of arrival (DOA) is slower than that of the channel fading, the steering vector of the desired signal is estimated firstly using a subspaee decomposition method and then a constrained condition is configured. Traffic signals are further employed to estimate the channel vector based on the constrained least squares criterion. We use the iterative least squares with projection (ILSP) algorithm initialized by the pilot to get the estimation. The accuracy of channel estimation and symbol detection can be progressively increased through the iteration procedure of the ILSP algorithm. Simulation results demonstrate that the proposed algorithm improves the system performance effectively compared with the conventional 2-D RAKE receiver. |
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| Keywords: | 2-D RAKE receiver channel estimation subspace decomposition constrained least squares |
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