Arunmozhi S.* | Nagarajan G.
OPEN ACCESS
Improving spectral efficiency is a major challenge in the wireless relaying networks. Spatial modulation (SM) yields a good solution to improve the spectral efficiency by employing multiple antenna diversity schemes. Quadrature spatial modulation (QSM) is a modern digital MIMO transmission technique, which exploits the advantages of spatial modulation in cooperative communication. QSM promises improvement in spectral efficiency and reliability of communication is enhanced. In QSM system, inter channel interference (ICI) is evaded entirely due to the orthogonality of the two transmitted data and modulated on the real and imaginary parts of the carrier signals. A quadrature modulation technique in full-duplex and the half duplex cooperative relay network is implemented by employing decode and forward protocol. The analytical model of the system is proposed and evaluated for error performance. The Bit error rate performance of spatial modulation and quadrature spatial modulation are compared. Results show that QSM has better performance and better spectral efficiency in cooperative relay network.
relay, quadrature spatial modulation, spectral efficiency, spatial modulation
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