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|Title:||Mitigating CFO in OFDM systems by exploring the symbol structure|
|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 systemÂ¿s performance is minimal.|
|Appears in Collections:||DETI - Comunicações|
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