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本文介绍了一种新的大数逻辑译码法——准正交一步大数逻辑译码法。它克服了大数逻辑译码法存在的对码的要求过于严格,以及应用范围小的缺点。文中给出了码的准正交的定义,给出了准正交一步大数逻辑译码的基本思想、通用Ⅰ型和Ⅱ型准正交一步大数逻辑译码器的框图和译码方法,并以(7,4)循环码为例讨论了这种译码方法,结果表明,这种译码方法拓宽了大数逻辑译码法的应用范围,对数字传输有实用意义。
This paper introduces a new large logic decoding method - quasi-orthogonal one-step logic decoding method. It overcomes the large number of logical decoding method of the code requirements are too strict, and the shortcomings of the application range. The paper gives the definition of the quasi - orthogonal code, gives the basic idea of quasi - orthogonal one - step large number of logical decoding, generic type Ⅰ and type Ⅱ quasi - orthogonal one - step large number of logical decoder block diagram and decoding method (7, 4) cyclic code as an example to discuss the decoding method. The results show that this decoding method broadens the application range of large-scale logic decoding and has practical significance for digital transmission.