摘要
空时编码(STC)技术是通过利用阵列天线处理技术从而开发多输入多输出系统(MIMO)性能的革命性发展,它可以有效抵消衰落,提高频谱效率.文中介绍了空时编码技术的由来及特点;讨论了3类接收机需要已知信道传输系数的空时编码技术:分层空时结构、空时格型码和正交空时分组码,给出了各自的实现框图及译码算法和特点;讨论了适于少数不知道信道传输系数情况的差分空时编码;给出了空时编码技术在无线通讯中的应用前景和目前的研究方向及热点.
SpaceTime Coding, as a revolutionary development for exploiting the MIMO channel capacity by using antenna array processing technology, has attracted considerable interests throughout wireless industry for its excellent performance of confronting multipath fading. The origin and the basic characteristics of the spacetime coding is presented firstly in this paper, followed by the presentation of the three spacetime coding schemes: OSTBC, BLAST and STTC with their encoding and decoding algorithms. Then the unitary spacetime codes and differential spacetime codes, suitable for the rare occasions when CSI is not available, are summarized. Finally the prospects of spacetime coding and the research trend are put forward.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第5期634-639,662,共7页
Journal of Xidian University
基金
国家自然科学基金资助项目(60172028
60102005)
