Turbo码的矩阵描述及其对交织器设计的影响

The Matrix Description of Turbo Codes and the Effect on the Design of the Interleaver

从信号与系统角度研究了Turbo码编码器的工作原理 ,并在这一基础上指出了Turbo码交织器设计过程中应注意的一些问题 .从信号与系统的观点 ,Turbo码编码器的输出码字可以看成是零输入响应和零状态响应的叠加 ,这样可以得出编码器输出码字是由输入信息和几个与编码器结构有关的基本矩阵唯一确定的结论 .利用这样的结论 ,作者讨论了交织器设计过程中满足距离谱特性要求时应遵循的一些设计原则 ,这样可以更好地了解Turbo码的内部结构以及交织器的重要作用 .

Based on the signal and the system, the principle of operation for the Turbo codes is considered, and some noted problems are discussed in the design of the interleaver for Turbo codes. The output of the encoder for the Turbo codes consists of zero-input response and zero-state response, thus the conclusion is get that output of the encoder is determined by the input information and several basic matrices related to the structure of the encoder. Based on this conclusion, some principles followed in the design of the interleaver on the property of the free distance are discussed, so we can know more about the inner structure of Turbo codes and the importance of the interleaver.