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Code-Index Modulation Aided Quadrature Spatial Modulation for High-Rate MIMO Systems
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DOI：10.1109/TVT.2019.2928378.png)
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Abstract
En 中文
In this correspondence paper, a novel code-index modulation (CIM) aided quadrature spatial modulation (QSM) scheme, called CIM-QSM, is proposed for highly spectrum and energy efficient multiple-input multiple-output (MIMO) systems. The CIM-QSM scheme transmits information over three different transmit entities: modulated symbols, activated antenna indices, and spreading code indices. Hence, a higher efficiency in terms spectrum and energy use, and better error performance compared to the conventional direct sequence spread spectrum, spatial modulation (SM), QSM, and CIM aided SS (CIM-SS) schemes are obtained by the CIM-QSM technique for MIMO communication systems. Analytical expressions for the average bit error rate, energy efficiency, and throughput of the CIM-QSM system are performed and the theoretical results are validated with Monte Carlo simulation results.
Keywords:
Modulation
Receivers
MIMO communication
Indexes
Transmitting antennas
Detectors
Quadrature spatial modulation
code index modulation
MIMO systems
and direct sequence spread spectrum
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