Validation and stabilization of noise matrices

摘要

A method includes receiving a signal via multiple receive antennas. A noise covariance matrix, which indicates noise correlations between pairs of the receive antennas, is estimated. A stability criterion defined over the noise covariance matrix is evaluated, and the noise covariance matrix is modified when the stability criterion is violated. The received signal is processed using the modified noise covariance matrix.

主权项

1. A method, comprising:
receiving a signal via multiple receive antennas; estimating a noise covariance matrix, which indicates noise correlations between pairs of the receive antennas, including estimating one or more non-zero off-diagonal elements of the noise covariance matrix; evaluating a stability criterion defined over the non-zero off-diagonal elements of the noise covariance matrix by verifying whether the non-zero off-diagonal elements are smaller than a threshold in relation to diagonal elements of the noise covariance matrix, and modifying the noise covariance matrix by reducing values of one or more of the non-zero off-diagonal elements when the stability criterion is violated; and processing the received signal using the modified noise covariance matrix.