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Polynomial-Based Noise Variance Estimation for MIMO-SCBT Systems

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3 Author(s)
Bin Jiang ; Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing ; Wenjin Wang ; Xiqi Gao

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.

Published in:

Signal Processing Letters, IEEE  (Volume:16 ,  Issue: 6 )

Date of Publication:

June 2009

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