Abstract
In this paper, a multiple antenna state based fully generalized spatial modulation (MAS-FGSM) system is proposed to overcome the limitation that the number of the available transmit antenna combinations in traditional generalized spatial modulation (GSM) system must be an integer power of two and increase the number of possible antenna combinations by multiple transmit antenna states. Through the joint mapping of the space and signal domain, all the transmit antenna combinations can be employed to carry information bits. The transmit antenna combinations are divided into two parts to send two correspondingly modulated symbols with different modulation orders. With natural mapping strategy, the active transmit antenna combination and the corresponding modulated symbols are determined. The maximum likelihood (ML) detection is utilized in the receiver and the upper bound of the average bit error rate (ABER) of the proposed system is obtained. Numerical results show that the proposed system can effectively reduce the modulation order of transmitted symbols and improve system performance compared with the conventional GSM systems.
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