Quasi-orthogonal space-time block codes based on single symbol decoding for four transmit antennas

It has been shown that a quasi-orthogonal space-time block code (QOSTBC) provides full transmission rate and half of the maximum possible diversity for four transmit antennas. We can see that QOSTBC has high complexity at the decoder since pairs of transmitted symbols are decoded with two parallel m...

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Bibliographic Details
Main Authors: Jae-Sun Jeong, Su-Bin Park, Chang-Bum Jo, Eun-Ji Yoo, Youn-Shik Byun
Format: Conference Proceeding
Language:English
Subjects:
Block codes
Detectors
Fading
Interference
Maximum likelihood decoding
Maximum likelihood detection
Mean square error methods
MIMO
minimum mean square error
Quasi-Orthogonal Space-Time Block Code
Receiving antennas
single symbol decoding
Transmit diversity
Transmitting antennas
zero-forcing
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Summary:It has been shown that a quasi-orthogonal space-time block code (QOSTBC) provides full transmission rate and half of the maximum possible diversity for four transmit antennas. We can see that QOSTBC has high complexity at the decoder since pairs of transmitted symbols are decoded with two parallel maximum likelihood (ML) detectors. In this paper, we propose new decoding schemes for reducing complexity at the decoder. By using Quasi-ZF based on the traditional Zero Forcing technique and Quasi-MMSE based on the traditional minimum mean squared error (MMSE) technique, we can have channel interference parameter be zero. As a result, only diagonal components remain. Eventually, we can detect the transmitted symbols easily with single ML detector. The proposed scheme can be used in case that all channel interference parameters are pure imaginary values in QOSTBC.
ISSN:1738-9445