Title :
Low-Complexity Optimal Detection for Hybrid Space-Time Block Coding and Spatial Multiplexing
Author :
Wu, Yue ; Tellambura, Chintha
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB
Abstract :
The combination of space-time block codes (STBC) and spatial multiplexing (SM) schemes has the advantages of diversity gain and high data rate. For such STBC/SM hybrid systems, we propose a new detector based on the block structure of STBC and the sphere decoder (SD). By employing the SD, optimal detection is performed with computational complexity much less than the brute-force maximum likelihood (ML) search. Simulation results show that the new decoder significantly outperforms the previously developed zero-forcing (ZF) group/STBC detector, the minimum mean square error (MMSE) group/STBC detector, and the MMSE and ML detectors for equivalent SM systems.
Keywords :
block codes; decoding; least mean squares methods; maximum likelihood estimation; multiplexing; space-time codes; brute-force maximum likelihood search; computational complexity; diversity gain; hybrid space-time block coding; low-complexity optimal detection; minimum mean square error; spatial multiplexing; sphere decoder; zero-forcing grou; Block codes; Detectors; Diversity methods; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Maximum likelihood estimation; Receiving antennas; Samarium; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.64
