Optimising quasi-orthogonal STBC through group-constrained linear transformation

被引：9
作者：
Yuen, C.
Guan, Y. L.
Tjhung, T. T.
机构：
[1] Inst Infocomm Res, Singapore 119613, Singapore
[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
来源：
IET COMMUNICATIONS | 2007年 / 1卷 / 03期
关键词：
D O I：
10.1049/iet-com:20050438
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The generic algebraic structure of a quasi-orthogonal space-time block code (QO-STBC) has been derived, and group-constrained linear transformation (GCLT) as a mean to optimise the diversity and coding gains of a QO-STBC with square or rectangular QAM constellations has been proposed. Compared with QO-STBC with constellation rotation (CR), QO-STBC with GCLT requires only half the number of symbols for joint detection, hence lower maximum-likelihood decoding complexity. The optimum GCLT parameters for QO-STBC with square QAM constellation have been derived analytically. The optimised QO-STBCs with GCLT are able to achieve full-transmit diversity and have negligible performance loss compared with QO-STBCs with CR at the same code rate.
引用
收藏
页码：373 / 381
页数：9
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