Patent ID: 8583051

Claim:
An apparatus for cancelling interference between neighboring cells, comprising: a receiving unit for receiving reception power information and Signal-to-Noise power Ratio (SNR) information of a neighboring cell base station from multiple receiving antennas; a first determination unit for determining a number of dominant neighboring cell interference signals using the received reception power information and SNR information; a second determination unit for fixing a candidate signal vector of a target signal depending on the determined number of dominant neighboring cell interference signals, the received SNR information, and a number of the multiple receiving antennas; a third determination unit for fixing a candidate signal matrix of the dominant neighboring cell interference signals based on the fixed candidate signal vector of the target signal; and an estimation unit for cancelling interference from signals transmitted from the neighboring cell base station by applying the fixed candidate signal matrix of the dominant neighboring cell interference signals to a reception signal vector in accordance with a Maximum Likelihood (ML) technique, wherein the second determination unit selects C 0 candidate signal values of the target signal in an ascending order of Euclidean distances of the candidate signal values when the SNR is less than a threshold value required to determine the dominant neighboring cell interference signals or when the number of the dominant neighboring cell interference signals is equal to or greater than the number of the receiving antennas, and fixes a candidate signal vector of the target signal, which includes the selected C 0 candidate signal values of the target signal.