Patent ID: 9210025
Filing Date: 2015-12-08
Classification: H04L

Abstract:
1. A method for correcting in-phase and quadrature-phase IQ signals, the method comprising: saving an I signal of a last frame and a Q signal of the last frame; receiving an I signal of a current frame and a Q signal of the current frame; eliminating a direct-current offset of the I signal of the current frame according to a statistically measured average level value of the I signal of the last frame; eliminating a direct-current offset of the Q signal of the current frame according to a statistically measured average level value of the Q signal of the last frame; saving an I signal of the last frame after direct-current offset elimination and a Q signal of the last frame after direct-current offset elimination; and geometrically correcting an I signal of the current frame after direct-current offset elimination and a Q signal of the current frame after direct-current offset elimination according to the I signal of the last frame after direct-current offset elimination and the Q signal of the last frame after direct-current offset elimination to obtain a corrected I signal of the current frame and a corrected Q signal of the current frame, the geometrically correcting the I signal and the Q signal comprising: