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In MIMO systems, the presence of phase noise is a significant factor that can degrade performance. For MIMO testbeds build from SDR devices, phase noise cannot be ignored, particular in applications that require phase synchronization. This…

Signal Processing · Electrical Eng. & Systems 2025-07-17 Carl Collmann , Bitan Banerjee , Ahmad Nimr , Gerhard Fettweis

In this letter we study the design of algorithms for estimation of phase noise (PN) with colored noise sources. A soft-input maximum a posteriori PN estimator and a modified soft-input extended Kalman smoother are proposed. The performance…

Information Theory · Computer Science 2014-07-18 M. Reza Khanzadi , Rajet Krishnan , Thomas Eriksson

The main limitation in order to exploit spin torque nano-oscillators (STNOs) in various potential applications is their large phase noise. In this work, we demonstrate its efficient reduction by a highly reconfigurable, compact,…

Phase-noise (PN) estimation and compensation are crucial in millimeter-wave (mmWave) communication systems to achieve high reliability. The PN estimation, however, suffers from high computational complexity due to its fundamental…

Information Theory · Computer Science 2021-09-29 MinKeun Chung , Liang Liu , Ove Edfors

Phase-locked loops (PLLs) are now widely used in communication systems and have been a classic system for more than 60 years. Well-known mathematical models of such systems are constructed in a number of approximations, so questions about…

Systems and Control · Electrical Eng. & Systems 2021-02-22 Mikhail A. Mishchenko , Denis I. Bolshakov , Alexander S. Vasin , Valery V. Matrosov , Ilya V. Sysoev

Phase noise (PN) is a major disturbance in MIMO systems, where the contribution of different oscillators at the transmitter and the receiver side may degrade the overall performance and offset the gains offered by MIMO techniques. This is…

Information Theory · Computer Science 2024-05-14 Alberto Tarable , Francisco J. Escribano

Oscillator phase noise (PN) is one of the major problems that affect the performance of communication systems. In this paper, a direct connection between oscillator measurements, in terms of measured single-side band PN spectrum, and the…

Information Theory · Computer Science 2016-11-17 M. Reza Khanzadi , Dan Kuylenstierna , Ashkan Panahi , Thomas Eriksson , Herbert Zirath

The presented paper introduces a design for a phase-locked loop (PLL) that is utilized in frequency synthesis and modulation-demodulation within communication systems and in VLSI applications. The CMOS PLL is designed using 180 nm…

Systems and Control · Electrical Eng. & Systems 2024-06-21 Priyam Kumar , Akshada Khele , Aditee C. Joshi

Optomechanical oscillators (OMOs) combine the co-existing high quality factor mechanical and optical resonances in an integrated device to realize low phase noise RF oscillations. While several attempts have been demonstrated towards…

Optics · Physics 2019-04-08 Cijy Mathai , Sunil A. Bhave , Siddharth Tallur

Clock generation is an essential part of wireless or wireline communication modules. To facilitate recent advancements in wireline-like communication and in-sensor computing modules at relatively lower data rates, ultra-low power, and…

Signal Processing · Electrical Eng. & Systems 2024-10-23 Yudhajit Ray , Archisman Ghosh , Shreyas Sen

Phase-locked loop (PLL), conceived in 1932 by H. Bellescize, has been the basic electronic component in the development of communication technology from the early analog radio receptors to modern digital civil and military facilities.…

Systems and Control · Electrical Eng. & Systems 2024-11-28 José Roberto Castilho Piqueira , Felipe Freitas , Luis Antonio Aguirre

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…

Information Theory · Computer Science 2024-06-21 Amina Piemontese , Giulio Colavolpe , Thomas Eriksson

We have developed a new methodology and a time-domain software package for the estimation of the oscillation frequency and the phase noise spectrum of non-linear noisy microwave circuits based on the direct integration of the system of…

Computational Physics · Physics 2007-05-23 C. Tannous

Phase-locked loops (PLL), Costas loops and other synchronizing circuits are featured by the presence of a nonlinear phase detector, described by a periodic nonlinearity. In general, nonlinearities can cause complex behavior of the system…

Systems and Control · Computer Science 2015-08-21 Vera Smirnova , Anton Proskurnikov , Natalia V. Utina

Understanding the interference scenario in power lines network is a key step to characterize the power line communication (PLC) system. This paper focuses on the characterization and modelling of the stationary noise in Narrowband PLC.…

Signal Processing · Electrical Eng. & Systems 2019-12-03 Raja Alaya , Rabah Attia

Cell-Free massive MIMO networks provide huge power gains and resolve inter-cell interference by coherent processing over a massive number of distributed instead of co-located antennas in access points (APs). Cost-efficient hardware is…

Signal Processing · Electrical Eng. & Systems 2023-05-23 Yibo Wu , Luca Sanguinetti , Ulf Gustavsson , Alexandre Graell i Amat , Henk Wymeersch

Non-contact scanning probe microscopy (SPM) has developed into a powerful technique to image many different properties of samples. The conventional method involves monitoring the amplitude, phase or frequency of a cantilever oscillating at…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 Manan Mehta , Venkat Chandrasekhar

As the demand for 6G technologies continues to grow, the radio access infrastructure is expected to become increasingly dense. Cell-free (CF) Massive MIMO systems provide remarkable flexibility by enabling coherent service to users through…

Networking and Internet Architecture · Computer Science 2025-03-18 Igor Zhilin , Evgenii Vinogradov , Ian Akyildiz

The phase locking value (PLV) is a widely used measure to detect phase connectivity. Main drawbacks of the standard PLV are it can be sensitive to noisy observations and does not provide uncertainty measures under finite samples. To…

Methodology · Statistics 2025-09-09 Shonosuke Sugasawa , Takeru Matsuda , Tomoyuki Nagakawa

The parameterization method (PM) provides a broad theoretical and numerical foundation for computing invariant manifolds of dynamical systems. PM implements a change of variables in order to represent trajectories of a system of ordinary…

Dynamical Systems · Mathematics 2024-04-16 Alberto Pérez-Cervera , Benjamin Lindner , Peter J. Thomas
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