Patent ID: 8468437
Filing Date: 2013-06-18
Classification: H04B,H04L

Abstract:
1. A filtering method, comprising: acquiring data transmission errors of data over a part of multiple subcarriers between a first communication equipment and a second communication equipment; wherein the part of multiple subcarriers each are selected at an interval of N subcarriers; acquiring filtering coefficients of the part of subcarriers according to the data transmission errors of the data over the part of subcarriers with a coefficient update formula in one of a Least Mean Square (LMS) algorithm, a linear zero forcing method, a Singular Value Decomposition (SVD) method, or a QR decomposition method; wherein the filtering coefficient of each subcarrier is acquired according to the data transmission error of the data over the subcarrier; acquiring filtering coefficients of remaining subcarriers according to the filtering coefficients of the part of subcarriers; wherein the remaining subcarriers are other subcarriers except the part of multiple subcarriers among all subcarriers between the first communication equipment and the second communication equipment; filtering data corresponding to the multiple subcarriers according to the filtering coefficients of the part of subcarriers and the filtering coefficients of the remaining subcarriers; determining, by the first communication equipment, whether the filtering coefficients corresponding to the multiple subcarriers meet a preset condition; if not, selecting first subcarriers which are located a motion value away from the part of subcarriers; wherein the motion value is (½ acquiring, by the first communication equipment, the filtering coefficients of the first subcarriers according to the data transmission error of the data over the first subcarriers; acquiring, by the first communication equipment, according to the filtering coefficients of the part of subcarriers and the filtering coefficients of the first subcarriers, filtering coefficients of remaining subcarriers, wherein the remaining subcarriers are a result of subtracting the first subcarriers and the part of subcarriers from all the multiple subcarriers; and filtering, by the first communication equipment, the data corresponding to the multiple subcarriers according to the filtering coefficients of the first subcarriers and the filtering coefficients of the remaining subcarriers, wherein the remaining subcarriers are the result of subtracting the first subcarriers and the part of subcarriers from all the multiple subcarriers.