Blind carrier frequency offset estimator based on...

Details Blind carrier frequency offset estimator based on... Blind carrier frequency offset estimator based on...

2007-08-02

2010-06-22

Moore, Ian N (Department: 2463)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S206000, C370S209000

Reexamination Certificate

active

07742392

ABSTRACT:
A blind carrier frequency offset estimator is based on a single-OFDM-symbol training sequence in multi-user OFDMA uplink. Through multiple access interference modeling and analysis, a virtual user is employed that occupies the all null sub-carriers. By minimizing the energy leakage on the virtual user in term of tentative frequency offsets, the estimator can approach the real frequency offset. The estimator performs only on frequency-domain, simplifies interference calculations, and lowers the rank of the matrix. An iterative computation method is used to approach the real frequency offset.

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