EXIT chart applied to frequency domain turbo equalization for single carrier space-time block code per block

Abstract:
This paper is focused on the study of the convergence of the frequency domain turbo equalizer for space-time encoded signals with single-carrier modulation. For this study we employ the extrinsic information transfer chart. We use spacetime coding schemes adapted to frequency-selective channels and an efficient generalized receiver based on a space-time frequency domain detector. We study the influence of the orthogonal space-time code per block defined for 2 and 4 transmit antennas in the EXIT chart. Simulation results show that the scheme performs efficiently, for convolutional codes of memory 2, 3 and 5, over frequency-selective block fading channels for the second iteration and beyond.