Diversity Analysis of Space -- Time Modulation Over Time-Correlated Rayleigh-Fading Channels.

Most space-time codes in the literature were proposed based on two Ideal channel conditions: either quasi-static or rapid fading. How- ever, these codes may suffer performance degradation due to temporal correlation caused by the movement of the mobile terminal or Imperfect interleaving. In this correspondence, we provide a novel analytical frame- work for the diversity analysis of space-time modulation in lime-correlated fading environment. We show that the space-time signals of square size achieving full diversity in quasi-static fading channels also achieve full diversity in time-correlated fading channels, independently of the time correlation matrix. Consequently, various classes of space-time signals designed for quasi-static fading channels can also be used for full-diversity transmission over time-correlated fading channels. Moreover, we show that if the time correlation matrix is of full rank, the design criteria for time-cor- related fading channels are the same as those for rapid fading channels. To illustrate the theoretical results, some simulations were also performed under various temporal fading conditions. [ABSTRACT FROM AUTHOR]