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EPROM片的出现,给我们选择新的译码方案,设计简单实用、纠错能力强的译码器提供了新的器件。本文通过对应用于国产某型地空导弹指令传输系统的纠错编码——(15,7)分组循环码大数逻辑译码方案的讨论,提议对该码采用一种新的软判决译码方案——最大似然译码,并给出了用EPROM片实现该译码方案的一般设计步骤及逻辑图。
The emergence of EPROM chip, give us the choice of a new decoding scheme, the design of a simple and practical, error-correcting decoder provides a new device. In this paper, we discuss the logic decoding scheme of error correction coding - (15,7) cyclic codes in a certain ground-to-air missile command transmission system and propose a new soft decision decoding Scheme - maximum likelihood decoding, and gives the general design steps and logic diagrams of using EPROM chip to realize the decoding scheme.