Utilizing multiple antennas at the transmitter and receiver provides higher data rates and better reliability by exploiting spatial diversity. Space-time block codes (STBCs) is a simple approach for using multiple transmit and receive antennas that has been widely employed in standards. The STBCs introduced in the literature use independent two-dimensional constellations, while the performance of orthogonal STBCs may be improved with multidimensional constellations. These constellations are transmitted by combining multiple space-time resources to form a multidimensional signal space. In this paper, we propose a method for finding optimized multidimensional constellations for orthogonal STBCs. Optimization is performed by minimizing a novel bound on the block or symbol error rate. We show that a substantial improvement in the error probability can be achieved with these novel constellations.

Additional Metadata
Persistent URL dx.doi.org/10.1109/GLOCOM.2014.7417879
Conference 58th IEEE Global Communications Conference, GLOBECOM 2015
Citation
Khoshnevis, H. (Hossein), Marsland, I, & Yanikömeroǧlu, H. (2015). Irregular multidimensional constellations for orthogonal STBCs. In 2015 IEEE Global Communications Conference, GLOBECOM 2015. doi:10.1109/GLOCOM.2014.7417879