Title :
Few More Quasi-Orthogonal Space-Time Block Codes for Four Transmit Antennas
Author :
Thakur, Narendra Singh ; Thakur, Satendra Singh ; Gogoi, Anup Kumar
Author_Institution :
Dept. of Electron. & Comm. Eng., Inst. of Technol. & Manage., Gwalior, India
Abstract :
In this paper, we derive few new quasi-orthogonal space-time block codes for four transmit antennas. These codes differ from each other and existing codes in character matrices and/or correlated values in character matrices. These codes can be constructed using elementary sub-matrices. We also derive corresponding maximum-likelihood decoders for the proposed codes. We observe that decoding complexity of some of these codes is less as compared to the rest of them for rectangular-QAM modulation. Bit error rate performance of these codes have been shown to be same as those of existing quasi-orthogonal space time block codes for four transmit antennas over quasi-static flat Rayleigh fading channels.
Keywords :
Rayleigh channels; error statistics; maximum likelihood decoding; quadrature amplitude modulation; space-time block codes; transmitting antennas; bit error rate performance; character matrices; decoding complexity; elementary sub-matrices; maximum-likelihood decoders; quasiorthogonal space time block codes; quasiorthogonal space-time block codes; quasistatic flat Rayleigh fading channels; rectangular-QAM modulation; transmit antennas; Block codes; Decoding; Equations; Fading; Receiving antennas; Transmitting antennas; Vectors; Bit error rate (BER); Character matrix; Correlated value; Diversity product; Maximumlikelihood (ML) decoding; Orthogonal space-time block codes (OSTBCs); Quasi-orthogonal space-time block codes (QOSTBCs);
Conference_Titel :
Computational Intelligence and Communication Networks (CICN), 2011 International Conference on
Conference_Location :
Gwalior
Print_ISBN :
978-1-4577-2033-8
DOI :
10.1109/CICN.2011.78
