Essence of 16‐QAM labelling diversity
Maciej Krasicki · Electronics Letters · 2013
Labelling diversity has appeared to be an efficient method to improve the performance of bit‐interleaved space‐time coded modulation with iterative decoding. It consisists in applying two different labelling maps within two spacial streams of the transmitter, which improves the benefits derived from multi‐antenna transmission. This reported work reveals a cardinal rule the two labellings must obey to become the optimal pair for labelling diversity purposes. It is concluded from results of a generalised binary switching optimisation algorithm, delivered herein, and from distance spectrum analysis.