Patent ID: 7668076
Filing Date: 2010-02-23
Classification: H04L

Abstract:
1. A multi-user receiving method in a base station with which a plurality of mobile stations each assigned to a respective user simultaneously communicate in accordance with a single-carrier frequency division multiple access scheme, said method comprising the steps of: converting SC-FDMA received signals of all users to signals in a frequency domain commonly; selecting part of the sub-carriers for each user contained in the signals in a frequency domain; and performing reception processing by limiting the frequency band of each user signal, to separate the user signal and to suppress noise, and by demodulating the user signal to detect a reception timing to generate a timing control signal, wherein said demodulating the user signal comprises: generating a pilot reference signal in a frequency domain of each user from pilot symbols; responsive to the received pilot signal, the band of which has been limited by a reception filter, and to the pilot reference signal generated by said generating step, calculating a transmission channel estimate; responsive to the received signal, the band of which has been limited by said reception filter, and to an equalization weight calculated from the transmission channel estimate, equalizing the received signal; and detecting a reception timing from a transmission channel response resulting from an IDFT of the transmission channel estimate to generate the timing control signal.