LMS equalizer very simple

LS自适应均衡仿真程序，利用矩阵运算实现，程序简洁，有助于学习和理解自适应算法理论-LS adaptive equalization simulation program, using matrix operations to achieve the program simple, to the learning and understanding adaptive algorithm theory

have further added a very simple Linear Equalizer to the code, where I assume that the channel is perfectly known. Note that for equalization to work here, the prefix length must be equal to or greater than the length of the channel.