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Turbo码是一种新型的二进制并行级连带反馈系统卷积码,它具有令人惊异的接近Shannon理论值的纠错能力。本文首先分析了Turbo码编、译码的基本原理,在此基础上给出了计算Turbo码距离谱的一种有效算法,并分别对四种不同的交织器进行了验证,得出了实验结果。文中还从距离谱的观点对Turbo码的性能作了定性的解释。
Turbo Code is a new type of binary parallel convolution feedback code with convolutional code, which has an astonishingly close Shannon theoretical value of error correction. This paper first analyzes the basic principle of Turbo code coding and decoding, and on this basis, gives an effective algorithm to calculate the distance spectrum of Turbo codes, and verifies the four different interleavers respectively. The experimental results . The paper also qualitatively explains the performance of Turbo codes from the distance spectrum point of view.