论文部分内容阅读
本文介绍了一种从已知的高速率收缩卷积码来构成速率兼容卷积码(RCC码)的方法,这种收缩卷积码是从最佳速率1/2码中获得的.本文提供的这种方法相当简单和直接,并且还能产生较好的编码.此外,还可获得低速率编码而对所获编码的最低速率没有限制.在RCC码的基础上,本文提出和分析了Ⅱ型通用化混合ARQ设计方案,这一方案综合了Hagenauer的Ⅱ型混合ARQ的修改方案和chase的代码组合ARQ方案的优点.采用所提供的Ⅱ型通用化混合ARQ方案,随着起始码速率的增加和信道条件的恶化,信道容量也会增加,它同速率为1/2的带有组合码的Ⅱ型混合ARQ方案的信道容量趋于一致.这样一来,甚至在噪声在较宽范围内变化,而信道条件又十分恶化的条件下,编码系统也能灵活地自适应于信道条件.
This paper presents a method of constructing a rate compatible convolutional code (RCC code) from a known high rate punctured convolutional code obtained from an optimum rate of 1/2 code.This article provides This method is relatively simple and straightforward, and can produce better coding. In addition, low-rate coding can be obtained without restriction on the minimum rate of coding.On the basis of RCC codes, this paper presents and analyzes Ⅱ Type generalized hybrid ARQ design which combines the advantages of Hagenauer’s type II hybrid ARQ and the chase’s code-combined ARQ scheme.Using the Type II generalized hybrid ARQ scheme, with the initial code rate And the channel condition is deteriorated, the channel capacity also increases, and the channel capacity of Type II Hybrid ARQ with combined code at a rate equal to 1/2 tends to be consistent, so that even when the noise is in a wide range Under the condition that the channel conditions are very deteriorated, the coding system can flexibly adapt to the channel conditions.