期刊名称：International Journal of Research in Computer Engineering & Electronics
印刷版ISSN：2319-376x
出版年度：2013
卷号：3
期号：3
语种：English
出版社：BHOPAL INSTITUTE OF PROFESSIONAL STUDIES
摘要：Diversity of receiving antenna is a widely applied technique to reduce the detrimental effects of multipath fading in wireless communications. However, it is hard to efficiently use receive antenna diversity at the remote units since they should remain relatively simple, inexpensive and small. Therefore, receive diversity has been used nearly exclusively at the base station. In order to enable high data rate transmission over wireless fading channels, recently different transmit diversity techniques have been introduced to benefit from antenna diversity also in the downlink while putting the diversity burden on the base station. In this paper we propose new trellis codes found through systematic code search. These codes achieve the theoretically maximal diversity gain and improved coding gain compared to known codes.Keywords - Diversity, multiple transmit antennas, space–time codes, wireless communication, space–time coded modulation
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