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Table 1: Synoptic Table of the Computational burden, Computation and the Channel Estimate MSE.

Procedure Computational burden approach DDST-DDD removal [11] 1 iteration Pre-calculated DDST ([4]) IST scheme in [7] 2 iterations every iteration DDST ([4]) MRST 2 iterations Precalculated DDST ([4])

notation expresses complexity, , and denote the equalizer length and the block length, respectively.