Articles

April 19, 2023

Theoretical Bounds of the Self-Interference Cancellation-Bandwidth Integral in Full Duplex RF Front Ends

This paper studies the behavior of lumped self-interference cancellation (SIC) filters in simultaneous transmit-receive (STR) RF front ends. The crux that enables a different approach in this work for finding an optimal network solution is converting the SIC circuit design...

By Dror Regev, Itamar Melamed, Nimrod Ginzberg, Emanuel Cohen

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April 13, 2023

accelerating wrf i/o performance with adios2 and network-based streaming

With the approach of Exascale computing power for large-scale High Performance Computing (HPC) clusters, the gap between compute capabilities and storage systems is growing larger. This is particularly problematic for the Weather Research and Forecasting Model (WRF), a widely-used HPC...

By Erick Fredj, Yann Delorme, Sameeh Jubran, Mark Wasserman, Zhaohui Ding, Michael Laufer

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March 5, 2023

Statistical Properties of NLIN in Presence of PDL

We present an analytical model which predicts the statistical properties of nonlinear interference noise in fiber links affected by PDL. We show that many features of NLIN, such as its phase and polarization rotation noise may be significantly modified by...

By Ori Golani, David Dahan

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January 15, 2023

Inter-Channel Nonlinear Interference Noise in the Presence of PDL

We present an analytical model which predicts the statistical properties of nonlinear interference noise (NLIN) in fiber links which are affected by polarization dependent loss (PDL). The model enables to investigate many PDL scenarios in a computationally efficient way, reducing...

By Ori Golani, David Dahan

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August 18, 2022

S-Parameter Analysis and Compact Formulation of Two-Port 90° N-Path Circuits

This brief introduces a compact S-parameter model of the two-port 90° N-Path circuit within the vicinity of the clock frequency. Transfer and reflection coefficients, which manifest the circuit filtering properties and the non-reciprocal phase shifting, are derived for a circuit...

By Dror Regev, Erez Zolkov, Emanuel Cohen

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June 19, 2022

A Four-Port Circulating Duplexer for Simultaneous Transmit Receive Wireless Operation

This article presents a new four-port electronic circulating duplexer (CD) that enables similar functionality to that of a four port circulator. The proposed CD is formed by connecting a quadrature hybrid (QH) and a quasi-circulating quadrature hybrid (QCQH). We derive...

By Dror Regev, Nimrod Ginzberg, Erez Zolkov, Erez Loebl, Itamar Melamed, Shimi Shilo, Doron Ezri, Emanuel Cohen

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June 6, 2022

pmAddr: a persistent memory centric computing architecture

Traditional Processor-centric computing architectures do not scale-out well, because servers do not share their local main memories. To bypass this architectural limitation, programmers place their shared state on shared storage. But since Storage is slow (many hundreds of microseconds), they...

By Amit Golander, Shai Taharlev, Yigal Korman

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June 2, 2022

Pruning Neural Nets by Optimal Neuron Merging

We present a new method for structured pruning of neural networks, based on the recently proposed neuron merging trick in which following a pruning operation, the weights of the next layer are suitably modified. By a rigorous mathematical analysis of the neuron...

By Felix Goldberg, Yackov Lubarsky, Alexei Gaissinski, Dan Botchan, Pavel Kisilev

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April 19, 2022

Linear Polarization Control for Shared Aperture SATCOM Systems at Ku-Band

This paper presents a new phase-shifting duplexer architecture for passive linear polarization control. The duplexer is based on reflective-type phase shifters employing Lange couplers and back-to-back varactor diode configuration, allowing simultaneous polarization rotation, low insertion loss, and high TX-RX isolation...

By Nimrod Ginzberg, Dror Regev, Asher Madjar, Emanuel Cohen

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