Secondly, we introduce the structure of Turbo encoder and decoder and derive the formula of MAP algorithm and its modified algorithms in the log domain ( including Max-Log-MAP and Log-MAP ). 然后,介绍了Turbo码的基本构造与工作原理,详细推导了MAP译码算法和其在对数域中的简化算法(Max-Log-MAP和Log-MAP)。
The performance of Turbo multilevel codes is analyzed, and its formula of error rate is obtained. 并对Turbo码多级调制的误码性能进行分析,得出误码率计算公式;
The performance of Turbo multilevel codes is analyzed, and its formula of error rate is obtained. Simulation results show the validity of the design scheme and the formula. 对Turbo码多级调制的误码性能进行了分析,得出误码率计算公式,并对Turbo码调制方案进行了仿真,证明了结论的正确性。