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《中国工程科学》 >> 2006年 第8卷 第6期

平坦快衰落条件下天线数较多时空时格码的设计

东南大学移动通信国家重点实验室,南京 210096

资助项目 :国家自然科学基金资助项目(60272047) 收稿日期: 2005-02-04 修回日期: 2005-04-21 发布日期: 2006-06-20

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摘要

空时格码技术是近年来无线通信领域的一个研究热点,空时格码的设计准则问题一直是该技术的一个难点。在平坦快衰落条件下且天线数目较多时,基于最小平方欧式距离最大化的空时格码设计准则虽然优于经典的距离-积准则,但仍不完善。从平方距离分布与平方距离和方-方和比分布的角度对此进行了改进,得到改进的准则以及性能为目前最优的新码。还对快慢2种衰落条件下码性能差异的原因给出了新的解释,并将改进的码设计准则应用于智贪码的设计。

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