METHOD, BASE STATION AND ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM FOR ESTIMATING TIME OFFSET OF UPLINK SIGNALS

摘要

Disclosed are a method, a base station and an orthogonal frequency division multiple access (OFDMA) system for estimating time offset of uplink signals, belonging to the field of communication. Wherein, the method includes: extracting the data of each sub-carrier on a fast feedback channel (SI 02); parsing the extracted data to obtain source data (SI 04); restoring the source data to standard modulation data without time offset according to the modulation manner of the fast feedback channel (S106);comparing the standard modulation data with the extracted data, and obtaining a time offset estimation value for the uplink signal (SI 08). The present invention solves the problem of inaccurate time offset estimation and is easy to be implemented, and the time offset estimation value is accurate and reliable.