APPARATUS AND METHOD FOR ESTIMATING UPLINK FREQUENCY OFFSET IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM
摘要
<p>An apparatus and method for estimating and correcting an uplink frequency offset in an OFDM communication system are provided. A subscriber station (SS) once repeats an OFDM symbol including a ranging code allocated from a BS and transmits the repeated OFDM symbols to the base station (BS). The BS demodulates the two successive OFDM symbols received from the SS using the ranging code, sums the demodulated signal for each FFT window, and estimates the uplink frequency offset by multiplying the complex conjugate of a sum for a first FFT window by a sum for a second FFT window by the base station. The BS transmits a message including information about the frequency offset estimate to the SS. The SS then corrects the uplink frequency offset using the frequency offset information.</p>
申请公布号
KR20060033605(A)
申请公布日期
2006.04.19
申请号
KR20040082790
申请日期
2004.10.15
申请人
SAMSUNG ELECTRONICS CO., LTD.
发明人
KOO, JIN KYU;YOON, SEOK HYUN;SUH, CHANG HO;RO, JUNG MIN;PARK, DONG SEEK;CHO, YOUNG KWON