The Difficult Road of Expectation Propagation Towards Phase Noise Detection

Colavolpe, Giulio; Conti, Elisa; Piemontese, Amina; Vannucci, Armando

doi:10.1109/icc45041.2023.10278761

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Ideally, a local oscillator would produce a sinusoidal signal, whose power spectrum is a delta function at the carrier frequency, but in reality its output power appears also in a band around the desired frequency. Since the PN can strongly limit the performance, the study of the PN effects in communication systems has attracted a lot of interest in the literature of the last decades, see, e.g., [1]- [9].…”

Section: Introductionmentioning

confidence: 99%

Discrete-Time Models and Performance of Phase Noise Channels

Piemontese,

Colavolpe,

Eriksson

2024

IEEE Open J. Commun. Soc.

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This paper deals with the phase noise affecting communication systems, where local oscillators are employed to obtain reference signals for carrier and timing synchronizations. The most common discrete-time phase noise channel model is analyzed, with the aim to fill the gap between measurements and analytical models. In particular, the power loss and the intersymbol interference due to the presence of phase noise is evaluated with reference to the measurements parameters and to the system bandwidth. Moreover, the impact on the communication systems' performance of the phase noise originating from the oscillator non-idealities is considered, in case of free-running and phase-locked oscillators. The proposed analysis allows to extrapolate useful information about the performance of practical systems by investigating the power spectral density of the oscillator phase noise. An expression for the variance of the residual phase error after tracking, which depends on the main parameters of practical oscillators, is derived, and used to study the dependence of the performance on the symbol rate.INDEX TERMS Phase noise, oscillator noise, phase-locked loop, Wiener process.

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Section: Introductionmentioning

confidence: 99%

Discrete-Time Models and Performance of Phase Noise Channels

Piemontese,

Colavolpe,

Eriksson

2024

IEEE Open J. Commun. Soc.

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Digital PLLs for Phase Noise Channels: A Concept Based on the Tikhonov Distribution

Ripani,

Modenini,

Montorsi

2024

IEEE Signal Process. Lett.

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Expectation Propagation for Flat-Fading Channels

Conti

Piemontese

Colavolpe

et al. 2023

IEEE Wireless Commun. Lett.

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This letter addresses the problem of signal detection in flat-fading channels. In this context, receivers based on the expectation propagation framework appear to be very promising although presenting some critical issues. We develop a new algorithm based on this framework where, unlike previous works, convergence is achieved after a single forwardbackward pass, without additional inner detector iterations. The proposed message scheduling, together with novel adjustments of the approximating distributions' parameters, allows to obtain significant performance advantages with respect to the state-ofthe-art solution. Simulation results show the applicability of this algorithm when sparser pilot configurations have to be adopted and a considerable gain compared to the current available strategies.

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The Difficult Road of Expectation Propagation Towards Phase Noise Detection

Cited by 3 publications

References 15 publications

Discrete-Time Models and Performance of Phase Noise Channels

Discrete-Time Models and Performance of Phase Noise Channels

Digital PLLs for Phase Noise Channels: A Concept Based on the Tikhonov Distribution

Expectation Propagation for Flat-Fading Channels

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