The Farrell Law Firm, PC
Method and apparatus for compensating for the frequency offset in interleaved frequency division multiple access
Provided are a method and apparatus for compensating for a frequency offset in an interleaved frequency division multiple access. The method compensates for a frequency offset between a transmission signal and a reception signal for a uth user (1≦u≦U, where U denotes the number of users) in an interleaved frequency division multiple access. The method includes: (a) estimating the frequency offset from a selection signal that is determined as the reception signal for the uth user in an initial mode and as a feedback signal in a normal mode; (b) estimating multiple access interferences representing an extent to which reception signals for ith other users (1≦i≦U−1) at the same time interfere with the reception signal for the uth user; (c) subtracting the estimated multiple access interferences from the reception signal for the uth user and determining the subtraction result as the feedback signal; (d) determining whether steps (a), (b), and (c) have been repeated a predetermined number of times, and if it is determined that steps (a), (b), and (c) have not been repeated the predetermined number of times, going back to step (a); and (e) if it is determined that steps (a), (b), and (c) have been repeated the predetermined number of times, estimating the transmission signal for the uth user using the feedback signal finally determined in step (c) and the estimated frequency offset.
Samsung Electronics Co., Ltd.
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Yung-soo Chan-soo
Kim Hwang