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A Robust Estimation of Residual Carrier Frequency Offset With I/Q Imbalance in OFDM Systems | IEEE Journals & Magazine | IEEE Xplore

A Robust Estimation of Residual Carrier Frequency Offset With I/Q Imbalance in OFDM Systems


Abstract:

In this paper, we focus on improving the accuracy of frequency offset estimation for an orthogonal frequency-division multiplexing (OFDM) system under the conditions of t...Show More

Abstract:

In this paper, we focus on improving the accuracy of frequency offset estimation for an orthogonal frequency-division multiplexing (OFDM) system under the conditions of the joint impairments in both carrier frequency offset (CFO) and in-phase/quadrature (I/Q) imbalance. To propose a robust CFO estimation scheme and to benchmark its performance, the performance of the conventional frequency estimation algorithm in the presence of I/Q imbalance is analyzed, and some modifications to the conventional estimation scheme are highlighted. We show via simulations that such a design achieves a remarkable robustness against I/Q imbalance; thereby, the proposed scheme can efficiently estimate the CFO, irrespective of the I/Q mismatch.
Published in: IEEE Transactions on Vehicular Technology ( Volume: 64, Issue: 3, March 2015)
Page(s): 1254 - 1259
Date of Publication: 11 March 2014

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