Patent ID: 8009746
Filing Date: 2011-08-30
Classification: H04J,H04L

Abstract:
1. An uplink signal receiving method using successive interference cancellation (SIC) in a wireless transmission system based on Orthogonal Frequency Division Multiple Access (OFDMA), the uplink signal receiving method comprising the steps of: storing in a provisional storage each uplink intermediate frequency (IF) signal received through an antenna of a base station and subjected to analog-to-digital conversion; analyzing the uplink IF signals stored in the provisional storage in order to determine a terminal having a data symbol to be restored; converting the data symbol of the terminal from a time domain into a frequency domain; performing channel/phase correction on the converted data symbol; demodulating the corrected data symbol; determining if there is another terminal having another data symbol to be restored; and when there is another terminal, removing the demodulated data symbol of the terminal from the temporarily stored uplink IF signals in accordance with channel phase correction information and an offset estimate frequency, and then updating the uplink IF signals in the provisional storage.