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1. (WO2017157454) A RECEIVER AND A METHOD FOR ESTIMATING THE CARRIER FREQUENCY OFFSET IN A MULTICARRIER MODULATION SIGNAL

Pub. No.:    WO/2017/157454    International Application No.:    PCT/EP2016/055917
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Sat Mar 19 00:59:59 CET 2016
IPC: H04L 27/26
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
RUSEK, Fredrik
Inventors: RUSEK, Fredrik
Title: A RECEIVER AND A METHOD FOR ESTIMATING THE CARRIER FREQUENCY OFFSET IN A MULTICARRIER MODULATION SIGNAL
Abstract:
The invention relates to a receiver (101 ) for receiving a multicarrier modulation signal, wherein the multicarrier modulation signal comprises at least one training signal. The receiver (101 ) comprises an estimator (103) configured to estimate a fractional frequency offset ε of the multicarrier modulation signal on the basis of the at least one training signal, wherein the estimator (103) is configured to determine a first estimate εopt of the fractional frequency offset on the basis of an approximation (see (A)) of a log-likelihood function λ(ε), wherein the approximation (see (A)) of the log-likelihood function is based on the equation (see (B)), wherein αk denotes a set of weighting coefficients and φk(ε) denotes a set of basis functions; and an adjuster (105) configured to adjust the multicarrier modulation signal on the basis of the first estimate of the fractional frequency offset.