摘要
利用小波变换思想,提出一种基于小波去噪的多输入多输出正交频分复用(MIMO-OFDM)系统信道估计方法,以提高信道估计性能。该方法首先利用最小二乘(LS)方法进行信道估计,然后对估计后的结果进行小波去噪处理。该方法不需要预先知道信道的统计特性,与传统最小二乘信道估计方法相比,性能有明显提高。
A new method to estimate the channel of multiple-input multiple-output orthogonal frequency division multip- lexing （MIMO-OFDM） system with wavelet denoising is proposed based on wavelet transform to improve the performance of cannel estimation. The channel estimation is performed by least square method, and then the estimated result is processed with wavelet denoising. The method need not know any statistical characteristic of channel in advance. The performance of the estimation is improved more obviously, compared with linear interpolation or DFT interpolation. The conclusion is proved by computer simulation.
出处
《现代电子技术》
2011年第3期61-64,共4页
Modern Electronics Technique
关键词
信道估计
小波变换
多输入多输出
正交频分复用
channel estimation
wavelet transform
multiple-input multiple-output
orthogonal frequency division multi- plexing
