METHOD AND APPARATUS FOR CARRIER FREQUENCY OFFSET AND SAMPLING CLOCK FREQUENCY OFFSET TRACKING IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATION SYSTEMS

摘要

The present invention relates to an orthogonal frequency division multiplexed carrier frequency error and sampling frequency offset tracking method and apparatus in a wireless communication system.; After the method for this, track the carrier frequency offset and sampling frequency offset between transmitter and receiver, which receives the transmitting sub-carriers having orthogonality to each other at the same time in the invention, the detection data received from the transmitter using a first signal, the step of tracking the phase error due to carrier frequency error by using the detected received data, after the detection of the received data from the transmitter using a first signal, using the detected received data phase error caused by the sampling frequency offset and a step of compensating a phase error caused by the sampling frequency offset between transmitter and receiver in accordance with the step of compensating a phase error of the carrier frequency error between the transmitting apparatus and the receiving apparatus, the tracking phase error in accordance with the step of tracking, the tracking phase error .; Through this, as well as improved system performance can be achieved to improve the reliability of estimates.