Quadrature spatial modulation based multiuser MIMO transmission system
| Autor: | Francisco R. Castillo-Soria, Joaquin Cortez, Ertugrul Basar, Marco Cardenas-Juarez |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
MIMO Detector 020302 automobile design & engineering 020206 networking & telecommunications 02 engineering and technology Interference (wave propagation) Spatial modulation Precoding Computer Science Applications Quadrature (astronomy) 0203 mechanical engineering Channel state information 0202 electrical engineering electronic engineering information engineering Bit error rate Fading Electrical and Electronic Engineering Algorithm Computer Science::Information Theory Communication channel |
| Zdroj: | IET Communications. 14:1147-1154 |
| ISSN: | 1751-8636 |
| Popis: | This study presents a multiuser (MU) multiple-input multiple-output (MIMO) downlink transmission scheme based on the quadrature spatial modulation (QSM) concept, which uses the indices of the non-zero entries in its transmission vector to modulate and transmit an independent sequence of bits for each user in the system. The MU interference is removed by using a matrix precoding technique based on channel state information (CSI) known as block diagonalisation (BD). The performance of the proposed scheme is compared with the conventional MU-MIMO-BD system for uncorrelated Rayleigh fading channels and correlated fading channels with imperfect CSI in the reception. Additionally, a low-complexity near maximum likelihood (ML) detection algorithm for the MU-MIMO-QSM signal's detection is proposed. For the considered cases, the proposed MU-MIMO-QSM scheme exhibits gains up to 1 dB in bit error rate performance and a reduction in detection complexity up to 93% as compared to the conventional MU-MIMO-BD scheme for the optimal ML detection. The proposed algorithm performs very near to the optimal ML detector whilst achieving a complexity reduction of up to 58%. |
| Databáze: | OpenAIRE |
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