Full-Diversity QO-STBC Technique for Large-Antenna MIMO Systems
AbstractThe need to achieve high data rates in modern telecommunication systems, such as 5G standard, motivates the study and development of large antenna and multiple-input multiple-output (MIMO) systems. This study introduces a large antenna-order design of MIMO quasi-orthogonal space-time block code (QO-STBC) system that achieves better signal-to-noise ratio (SNR) and bit-error ratio (BER) performances than the conventional QO-STBCs with the potential for massive MIMO (mMIMO) configurations. Although some earlier MIMO standards were built on orthogonal space-time block codes (O-STBCs), which are limited to two transmit antennas and data rates, the need for higher data rates motivates the exploration of higher antenna configurations using different QO-STBC schemes. The standard QO-STBC offers a higher number of antennas than the O-STBC with the full spatial rate. Unfortunately, also, the standard QO-STBCs are not able to achieve full diversity due to self-interference within their detection matrices; this diminishes the BER performance of the QO-STBC scheme. The detection also involves nonlinear processing, which further complicates the system. To solve these problems, we propose a linear processing design technique (which eliminates the system complexity) for constructing interference-free QO-STBCs and that also achieves full diversity using Hadamard modal matrices with the potential for mMIMO design. Since the modal matrices that orthogonalize QO-STBC are not sparse, our proposal also supports O-STBCs with a well-behaved peak-to-average power ratio (PAPR) and better BER. The results of the proposed QO-STBC outperform other full diversity techniques including Givens-rotation and the eigenvalue decomposition (EVD) techniques by 15 dB for both MIMO and multiple-input single-output (MISO) antenna configurations at
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Anoh, K.; Okorafor, G.; Adebisi, B.; Alabdullah, A.; Jones, S.; Abd-Alhameed, R. Full-Diversity QO-STBC Technique for Large-Antenna MIMO Systems . Electronics 2017, 6, 37.
Anoh K, Okorafor G, Adebisi B, Alabdullah A, Jones S, Abd-Alhameed R. Full-Diversity QO-STBC Technique for Large-Antenna MIMO Systems . Electronics. 2017; 6(2):37.Chicago/Turabian Style
Anoh, Kelvin; Okorafor, Godfrey; Adebisi, Bamidele; Alabdullah, Ali; Jones, Steve; Abd-Alhameed, Raed. 2017. "Full-Diversity QO-STBC Technique for Large-Antenna MIMO Systems ." Electronics 6, no. 2: 37.
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