基于实际无线局域网系统的信道估计算法  

Channel estimation algorithm based on practical wireless local area network system

作　　者：黄岚[1] 卢光跃[1] 王选宏[1] 姬翔 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]西安星河亮点信息技术有限公司研发部,陕西西安710075

出　　处：《西安邮电学院学报》2012年第4期1-5,共5页Journal of Xi'an Institute of Posts and Telecommunications

基　　金：国家自然科学基金资助项目(61102047);陕西省教育厅自然科学基金资助项目(11JK1021)

摘　　要：结合无线局域网(WLAN)系统进行适合实际系统的信道估计方法研究。针对实际系统在要求算法稳健性的同时,还要求算法简单易实现的特点,在最小二乘(Least Square,LS)算法中添加了离散傅里叶逆变换(Inverse Discrete Fourier Transform,IDFT)运算,利用信号在时域能量集中的特点,在时域对信号按门限值进行筛选,滤除大部分噪声,以此提高系统性能。仿真结果显示,改进算法可为实际WLAN系统所采用。The channel estimation algorithms suitable for the real system are studied by combining with Wireless Local Area Network （WLAN） system. Aiming at the characteristics of the practical system of requiring the algorithm to be robust as well as to be easily achieved, Inverse Discrete Fourier Transform （IDFT） is added in the Least Square （LS） algorithm, which uses the signal＇s feature of energy concentration to select the signals based on the threshold values within the time domain to filter most noise out, thereby improving the system performance. The simulation results show that the improved algorithm can be adopted in the practical WLAN system.

关 键 词：正交频分复用 最小二乘算法 最小均方误差算法 离散傅里叶变换 

分 类 号：TN929.5[电子电信—通信与信息系统]