基于信道量化反馈的预编码仿真程序，采用均匀量化方式，采用LDL分解的预编码技术，可得到不同反馈bit（1bit，2bit，3bit）条件下系统的误码性能。-Quantified based on channel feedback precoding simulation program, using the uniform quantization, LDL decomposition of the pre-coding techniques, and can get different feedback bit (1bit, 2bit, 3bit) under the conditions of the system BER performance.