Transmit antenna selection (TAS) is a practical method to improve the bit-error-rate (BER) performance of a multiple-input multiple-output (MIMO) systems. TAS is of particulate importance when spatial modulation (SM) is ...

Quadrature spatial modulation (QSM) was recently proposed to increase the spectral efficiency of spatial modulation. In QSM, the real and imaginary parts of a symbol are transmitted independently from different antennas. ...

This study develops a new class of super-orthogonal trellis codes for four transmit antennas based on double space-time codes. The transmit antennas are divided into two groups, each having two transmit antennas. The ...