Characterization of GFDM signal with timing offset, CFO, nonlinearity, and PN

Fereshteh Yazdani (), Mohammad Kazemi, Abbas Mohammadi and Abdolali Abdipour
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Fereshteh Yazdani: Amirkabir University
Mohammad Kazemi: Amirkabir University
Abbas Mohammadi: Amirkabir University
Abdolali Abdipour: Amirkabir University

Telecommunication Systems: Modelling, Analysis, Design and Management, 2024, vol. 87, issue 4, No 12, 1087-1098

Abstract: Abstract In this paper, we study the joint effects of timing offset (TO), carrier frequency offset (CFO), phase noise (PN), and nonlinear power amplifier distortion on a generalized frequency division multiplexing (GFDM) system. Classifying the TO into four cases based on the direction of offset, our work analyzes the signal-to-interference ratio (SIR) for each of the four cases at the GFDM receiver in the presence of synchronization errors, PN, and nonlinear power amplifier. Then, we conduct simulations to compare the performance of GFDM systems under these impairments with that of orthogonal frequency division multiplexing (OFDM) systems, considering both matched filter and zero-forcing. The results show that GFDM systems are more robust against TO and PN while they are more sensitive to CFO and nonlinear distortion compared to OFDM systems. More specifically, it is shown that employing GFDM improves the system SIR compared to OFDM by up to 3 dB and 1.5 dB under TO and PN distortions, respectively.

Keywords: Timing offset; Carrier frequency offset; Nonlinear power amplifier; phase noise; OFDM; GFDM (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11235-024-01193-8

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