Complex Quadrature Spatial Modulation
| Autor: | Saetbyeol Lee, Manar Mohaisen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
FOS: Computer and information sciences
General Computer Science Unitary rotation Computer Science - Information Theory lcsh:TK7800-8360 02 engineering and technology Signal lcsh:Telecommunication 0203 mechanical engineering lcsh:TK5101-6720 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Multiple‐input multiple‐output (MIMO) system Mathematics Information Theory (cs.IT) Spatial modulation lcsh:Electronics 020206 networking & telecommunications 020302 automobile design & engineering Constellation diagram Quadrature spatial modulation Spectral efficiency Electronic Optical and Magnetic Materials Quadrature (mathematics) QAM Transmission (telecommunications) Modulation Minkowski sum Algorithm Phase-shift keying |
| Zdroj: | ETRI Journal, Vol 39, Iss 4, Pp 514-524 (2017) |
| Popis: | In this paper, we propose a spatial modulation (SM) scheme referred to as complex quadrature spatial modulation (CQSM). In contrast to quadrature spatial modulation (QSM), CQSM transmits two complex signal constellation symbols on the real and quadrature spatial dimensions at each channel use, increasing the spectral efficiency. To this end, signal symbols transmitted at any given time instant are drawn from two different modulation sets. The first modulation set is any of the conventional QAM/PSK alphabets, while the second is a rotated version of it. The optimal rotation angle is obtained through simulations for several modulation schemes and analytically proven for the case of QPSK, where both results coincide. Simulation results showed that CQSM outperformed QSM and generalized SM (GSM) by approximately 5 and 4.5 dB, respectively, for the same transmission rate. Its performance was similar to that of QSM; however, it achieved higher transmission rates. It was additionally shown numerically and analytically that CQSM outperformed QSM for a relatively large number of transmit antennas. 11 pages, 3 tables, 11 figures. ETRI Journal, 2017 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|