Base station device, method thereof, and communication system thereof

摘要

A base station device, method, and communication system are disclosed. The base station includes a covariance matrix obtaining unit forming a covariance matrix of an interference vector and a noise vector from received signals from multiple user equipment; a ratio calculation and comparison unit that calculates a relative ratio between the interference and the noise in the received signals based on the covariance matrix and compares the ratio with a predetermined threshold; an adjusting unit that reduces values of non-diagonal elements in the covariance matrix when the ratio is less than the predetermined threshold; an equalizer unit that performs equalization based on the covariance matrix using an Interference Rejection Combining algorithm when the ratio is greater than or equal to the predetermined threshold, and equalizes the received signals based on the adjusted covariance matrix using a Minimum Mean Square Error algorithm when the ratio is less than the predetermined threshold.

主权项

1. A receiving device for a base station of a wireless communication system, comprising:
a covariance matrix obtaining unit configured to form an initial covariance matrix of an interference vector and a noise vector based on received signals from multiple user equipment; a ratio calculation and comparison unit configured to calculate a relative ratio between interference and noise elements of the received signals based on the initial covariance matrix and configured to compare the relative ratio with a predetermined threshold; an adjusting unit configured to reduce values of non-diagonal elements in the initial covariance matrix to form an adjusted covariance matrix when the relative ratio is less than the predetermined threshold; and an equalizer unit configured to adaptively switch an equalization algorithm between an Interference Rejection Combining (IRC) algorithm and a Minimum Mean Square Error (MMSE) algorithm such that the received signals are equalized based on the initial covariance matrix using the IRC algorithm when the relative ratio is greater than or equal to the predetermined threshold and the received signals are equalized based on the adjusted covariance matrix using the MMSE algorithm when the relative ratio is less than the predetermined threshold.