mimo下行的线性预编码，分别基于ZF准则和MMSE准则。-mimo downlink linear precoding, respectively, based on ZF criteria and MMSE criterion.

Linear Constellation Precoded OFDM

MIMO预编码，线性zf,mmse预编码性能比较-MIMO pre-coding, linear zf, mmse Performance Comparison of precoding

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。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。与传统最小二乘信道估计方法相比,该方法不需要预先知道信道的统计特性,信道估计性能有明显提高。-Based on wavelet transform,a method for MIMO-OFDM channel estimation with noise reduction is given,which is di