本文从软件方面来对高增益编码与调制技术进行研究，其中以后者作为重点研究。

This article studies the high gain code and the modulation technology from the software aspect, and take the key research on the latter.

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这种方法提高了编码增益。

This method increases the encoding gain.

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首先提出编码增益准则下s BC优化的统一形式化描述。

First, we develop an integrated formulation for SBC optimization with respect to coding gain criterion.

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