Transmit Antenna Selection and Artificial Noise Design for Secure STBC-SM Transmission

In this contribution, for enhancing the secure transmission of space-time block coded spatial modulation (STBCSM) systems, we conceive a minimum Euclidean distance (ED) transmit antenna selection (MED-TAS) method in conjunction with a new artificial noise (AN) design based on the optimized ED criterion (ED-AN). Specifically, we select the antennas by taking both legitimate receiver and eavesdropper into consideration, while proposing optimized ED-AN by minimizing the ED between the two specified signals, in order to enhance the performance at the legitimate receiver while degrading that at the eavesdropper. Simulation study demonstrates that the proposed technique is capable of achieving better security performance compared to its counterpart as conventional AN-aided STBC-SM design.