摘要
Channel estimation is very important for MIMO (Multiple Input Multiple Output) OFDM (Or-thogonal Frequency Division Multiplexing) systems, but its precision is reduced due to the noise in channel. In this letter, circularly slipping window is introduced to resist the noise. It can be proved by simulation that with the same channel model, optimal slipping window length is the same with different vehicle speed. MSE (Minimum Square Error) of channel is greatly reduced with circularly slipping window, and performance of the system is closed to that with correct channel estimation.
Channel estimation is very important for MIMO （Multiple Input Multiple Output） OFDM （Orthogonal Frequency Division Multiplexing） systems, but its precision is reduced due to the noise in channel. In this letter, circularly slipping window is introduced to resist the noise. It can be proved by simulation that with the same channel model, optimal slipping window length is the same with different vehicle speed. MSE （Minimum Square Error） of channel is greatly reduced with circularly slipping window, and performance of the system is closed to that with correct channel estimation.
关键词
循环滑动窗
信道估值
MIMO-OFDM
多重输出
通信理论
Circularly slipping window
Channel estimation
MIMO-OFDM （Multiple Input Multiple OutputOrthogonal Frequency Division Multiplexing）
