The performance of the linear MMSE MIMO channel estimator depends on the covariance matrix of the channel, which is estimated at the receiver during an initial training phase. In this paper, we firstly study the conventional sample covariance estimator and then we consider an alterative improved estimator. Analytic expressions for the linear MMSE channel estimation MSE are found, and detailed to a large sample set analysis, to take into account the effect of practical covariance matrix estimation. Numerical results consider the system performance for sample sets of finite size and corroborate the proposed analysis.
Effect of Channel Covariance Error on the MIMO Linear MMSE Channel Estimator
DALL'ANESE, EMILIANO;ASSALINI, ANTONIO;PUPOLIN, SILVANO
2009
Abstract
The performance of the linear MMSE MIMO channel estimator depends on the covariance matrix of the channel, which is estimated at the receiver during an initial training phase. In this paper, we firstly study the conventional sample covariance estimator and then we consider an alterative improved estimator. Analytic expressions for the linear MMSE channel estimation MSE are found, and detailed to a large sample set analysis, to take into account the effect of practical covariance matrix estimation. Numerical results consider the system performance for sample sets of finite size and corroborate the proposed analysis.File in questo prodotto:
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