Iterative Mean Removal Superimposed Training for SISO and MIMO Channel Estimation

Table 1

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

Procedure	Computational burden	𝐂^−𝟏	MSE(𝐡) approach
DDST-DDD removal [11]	𝒪(𝒬𝑁) 1 iteration	Pre-calculated	DDST ([4])
IST scheme in [7]	𝒪(3𝒬𝑁) 2 iterations	(𝐂+𝐁^0𝑥002𝑑𝑐)^−1 every iteration	DDST ([4])
MRST	𝒪(3𝒬𝑁) 2 iterations	Precalculated	DDST ([4])

𝒪(⋅) notation expresses complexity, 𝒬, and 𝑁 denote the equalizer length and the block length, respectively.