Transmit Antenna Selection and Energy Efficiency Improvement for Spatial Modulation

Spatial modulation (SM), which is proposed recently, is a low-complexity multiple-input multiple-output (MIMO) transmission technique. This paper considers the transmit antenna selection for spatial modulation to improve the performance in terms of bit error rate (BER). A low-complexity transmit antenna selection approach by using low-complexity angle and norm of column vectors of the channel matrix is proposed. Furthermore, this paper introduces a power correction factor which effectively constrains the transmission power. Simulation results show that the proposed algorithm can achieve nearly optimal performance with lower substantial computational complexity and limited transmission power.