Quasi-Orthogonal Space-Time Block Coding with Closed-Loop Control in MIMO Communication Systems
| Autor: | Mikhail Bakulin, Vitaly Kreyndelin, Dmitry Petrov, Sergei Melnik |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Proceedings of the XXth Conference of Open Innovations Association FRUCT, Vol 29, Iss 1, Pp 30-35 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2305-7254 2343-0737 |
| DOI: | 10.23919/FRUCT52173.2021.9435572 |
| Popis: | In the paper, we proposed a method of space-time diversity on the transmitting side, combining a closed feedback and quasi-orthogonal space-time coding technique called closed-loop control with quasi-orthogonal space-time block coding (QO-STBC). For a configuration 4x1-4x4 with four transmit and one receive antennas and four symbols per four resource elements, our method allows the QO-STBC to be completely orthogonalized what maximizes the diversity gain. It is shown that the developed approach can also be used for the 4x2-4x2 configuration. In this case, it is not possible to orthogonalize QO-STBC completely, but the level of inter-channel correlation is considerably reduced. A statistical modeling was carried out to study the characteristics of noise immunity of the proposed transmission scheme. We show that it is sufficient to use a one-bit command to control the phase of two transmitting antennas. A gain of 1.4 dB is achieved for the 4x1-4x4 scenario and 2.5 dB - for the 4x2-4x2 case. Phase control of transmitting antennas used in this method of signal transmission does not change the interference conditions. |
| Databáze: | Directory of Open Access Journals |
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