Patent ID: 8891671
Filing Date: 2014-11-18
Classification: H01Q,H04B

Abstract:
1. A method for calibrating a channel, comprising: performing slide-window correlation on a delayed downlink service signal of a current transmit channel and a feedback signal of the transmit channel, and performing sampling to obtain a group of correlation values of the transmit channel in a sliding window, wherein the sliding window is a time window for sampling the correlation values; determining a peak amplitude value among amplitude values of the group of correlation values in the sliding window and amplitude values at two points that are left adjacent and right adjacent to a point corresponding to the peak amplitude value; performing an interpolation operation on the peak amplitude value and the amplitude values of the two points that are left adjacent and right adjacent to the point to obtain an amplitude value, a delay, and a phase at an actual peak point in the group of correlation values of the transmit channel in the sliding window; and calibrating the transmit channel according to the amplitude value, the delay, and the phase at the actual peak point, wherein the determining the peak amplitude value among amplitude values of the group of correlation values in the sliding window, and amplitude values at two points that are left adjacent and right adjacent to a point corresponding to the peak amplitude value, comprises: wherein the interpolation on the peak amplitude value and the amplitude values of the two points that are left adjacent and right adjacent to the point to obtain an amplitude value, a delay, and a phase at an actual peak point in the group of correlation values of the transmit channel in the sliding window comprises: