Abstract
In this paper, we propose a novel algorithm for blind estimation of carrier frequency offset (CFO) in MPSK receivers by using differential constellation trace figures (DCTFs) with application to radio frequency (RF) fingerprint extraction. Due to the quasi-symmetry property of DCTF, carrier frequency offset can be estimated from the orientation of the unique symmetric axis of DCTF through minimizing DCTF's asymmetric energy term. In contrast to known algorithms, symbol rate and matched filter are not required in this algorithm while more samples are needed to generate DCTFs. Besides, the proposed algorithm can cope with a wide CFO range as large as 1/2M (M is the modulation order) of the sampling rate. Simulation results show that this algorithm performs well at high and medium SNRs in the presence of AWGN channels or flat Ricean-fading channels.
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