正交空时分组码最大比率合并接收组合形式的配方方法
A squaring method of the maximal-ratio receive combining scheme for orthogonal space-time block codes
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摘要: 该文研究了寻找正交空时分组码输出信号最大比率合并组合形式的配方方法,证明了一般正交空时分组码都可以采用配方的方法得到最大接收比率的组合形式。由于正交性,各输出支路可以独立地进行极小距离判决译码,其译码性能与用从各接收天线得到的接收矢量直接进行极大似然译码的性能完全相同,而译码复杂度却大为降低。
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关键词:
- 信道编码; 空时分组码; 分集技术
Abstract: A squaring method to find the maximal-ratio receive combining scheme of the orthogonal space-time block codes is presented. Furthermore, it is proved that this method can be used as a general method for the orthogonal space-time block codes. Considering the orthogonality, the minimum distance decisions for each output branch can be made respectively. The performance using this method is the same as that using the maximum likelihood decoding criterion while the complexity of decoding is much lower. -
V. Tarokh, N. Seshadri, A. R. Calderbank, Space-time codes for high data rate wireless communication, performance criterion and code construction, IEEE Trans. on IT, 1998, 44(2), 744-765.[2]S.M. Alamouti, A simple transmit diversity technique for wireless communications, IEEE J. on SAC,1998, 16(8), 1451-1458.[3]V. Tarokh, H. Jafarkhani, A. R. Calderbank, Space-time block codes from orthogonal designs.IEEE Trans. on IT, 1999, 45(5), 1456-1467.[4]V. Tarokh, H. Jafarkhani, A. R. Calderbank, Space-time block coding for wireless communications, performance results, IEEE J. on SAC, 1999, 17(3), 451-460. -
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