低密度奇偶检验码与分层空时码的级联仿真，具有很高的价值，希望对大家有用。-Low-density parity check codes and layered space-time codes of the cascade simulation, with a very high value and hope for all of us.

Is the topic of the elementary school stage curriculum design, Complete codec LDPC code, ML estimation method can be a good signal to noise ratio.