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Polynomial-based noise variance estimation for MIMO-SCBT systems
In this paper, we present a polynomial-based noise
variance estimator for multiple-input multiple-output single-carrier block transmission (MIMO-SCBT) systems. It is shown that the optimal pilots for noise variance estimation satisfy the same condition as that for channel estimation. Theoretical analysis indicates that the proposed estimator is statistically more efficient than the conventional sum of squared residuals (SSR) based estimator.
Furthermore, we obtain an efficient implementation of the
estimator by exploiting its special structure. Numerical results confirm our theoretical analysis