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Title: Mitigating CFO in OFDM systems by exploring the symbol structure
Author: Ribeiro, C.
Gameiro, A.
Issue Date: 2008
Publisher: IEEE
Abstract: In this paper we revisit the carrier frequency offset (CFO) estimation and removal for broadband orthogonal frequency division multiplexing (OFDM) systems. We propose an algorithm that explores the time-domain (TD) properties of transmitted symbols carrying pilots and data. A careful examination of the components that constitute the TD received symbols leads to the definition of a simple, yet effective, cost function. In a real scenario, the cost function presents a bowl shape with a single global minimum easily identifiable (no local minima). The proposed method is independent of the channel estimation and decision, presenting a very low computational load. The feasibility of the investigated method is substantiated by system simulation using BRAN-A broadband wireless channel model. Simulation results show that the impact of the residual CFO in the system¿s performance is minimal.
Peer review: yes
DOI: 10.1109/ISWCS.2008.4726014
ISBN: 978-1-4244-2488-7
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