WLAN OFDM系统信道估计技术

Channel Estimation Schemes of WLAN OFDM Systems

介绍了802.11a系统的信道估计技术,包括LS(最小平方)信道估计技术,维纳滤波器方法,以及它们的基本原理和主要算法。在802.11a系统的仿真平台上用LS和维纳滤波器方法分别对信道进行估计。仿真结果表明,对瑞利衰落信道,在相同的传输速率下,Wiener Filter的信道估计比LS信道估计都有一定的性能提高。

The paper presents the channel estimation schemes of IEEE 802.11a systems, including LS(Least Square), the Wiener-filter and their basic theories and the major algorithms. The channel estimations are performed by using LS and Wiener-filter method based on the platform of the 802.11a systems. The simulation results show that the performance of the Wiener Filter estimation is better than LS estimation based on Rayleigh fading channel for the same transmission rate.