Designing a Robust Carrier Frequency Offset Estimation Scheme for Meeting Target Decoding Performance in an OFDM System

TL;DR

This paper proposes a two-step carrier frequency offset estimation scheme for OFDM systems, improving decoding performance and SNR gain, especially in low SNR conditions, through a coarse and residual estimation approach.

Contribution

Introduces a novel two-step frequency offset estimation method with different time intervals, enhancing OFDM decoding performance over coarse-only estimators.

Findings

Achieves 1dB SNR gain in RF conduction tests

Outperforms coarse-only estimators in low SNR conditions

Demonstrates improved decoding performance in practical tests

Abstract

In a target communication system, a delicately designed frequency offset estimation scheme is required to meet certain decoding performance. In this paper, we proposed at wo-step estimation scheme, coarse and residual, with different value of an time interval parameter. A result of RF conduction test shows that the proposed method has an 1dB gain of SNR compared to coarse-only estimator. A result of the commercial test also indicates the proposed method outperforms coarse-only estimator especially in low SNR condition.