Search Results for author: Jinfeng Du

Found 10 papers, 0 papers with code

Multi-level Reliability Interface for Semantic Communications over Wireless Networks

no code implementations7 Jul 2024 Tze-Yang Tung, Homa Esfahanizadeh, Jinfeng Du, Harish Viswanathan

Semantic communication, when examined through the lens of joint source-channel coding (JSCC), maps source messages directly into channel input symbols, where the measure of success is defined by end-to-end distortion rather than traditional metrics such as block error rate.

Semantic Communication

Precoding-oriented Massive MIMO CSI Feedback Design

no code implementations22 Feb 2023 Fabrizio Carpi, Sivarama Venkatesan, Jinfeng Du, Harish Viswanathan, Siddharth Garg, Elza Erkip

Downlink massive multiple-input multiple-output (MIMO) precoding algorithms in frequency division duplexing (FDD) systems rely on accurate channel state information (CSI) feedback from users.

Energy Efficient Design of Extreme MIMO

no code implementations3 Jan 2023 Stefan Wesemann, Jinfeng Du, Harish Viswanathan

Ever since the invention of Bell Laboratories Layer Space-Time (BLAST) in mid 1990s, the focus of MIMO research and development has been largely on pushing the limit of spectral efficiency.

A wideband generalization of the near-field region for extremely large phased-arrays

no code implementations28 Jun 2022 Nitish Deshpande, Miguel R. Castellanos, Saeed R. Khosravirad, Jinfeng Du, Harish Viswanathan, Robert W. Heath Jr

The narrowband and far-field assumption in conventional wireless system design leads to a mismatch with the optimal beamforming required for wideband and near-field systems.

Outdoor-to-Indoor 28 GHz Wireless Measurements in Manhattan: Path Loss, Environmental Effects, and 90% Coverage

no code implementations19 May 2022 Manav Kohli, Abhishek Adhikari, Gulnur Avci, Sienna Brent, Aditya Dash, Jared Moser, Sabbir Hossain, Igor Kadota, Carson Garland, Shivan Mukherjee, Rodolfo Feick, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Gil Zussman

The measured OtI path gain can vary by up to 40 dB for a given link distance, and the empirical path gain model for all data shows an average of 30 dB excess loss over free space at distances beyond 50 m, with an RMS fitting error of 11. 7 dB.

Management Scheduling

Dense Urban Outdoor-Indoor Coverage from 3.5 to 28 GHz

no code implementations8 Mar 2022 Dipankar Shakya, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Theodore S. Rappaport

For 28 GHz with 1 W/polarization transmit power in the urban street grid, the downlink data rates for 90% of outdoor users are estimated at over 250 Mbps.

Sampling and Reconstructing Angular Domains with Uniform Arrays

no code implementations17 Feb 2022 Silvio Mandelli, Marcus Henninger, Jinfeng Du

The surge of massive antenna arrays in wireless networks calls for the adoption of analog/hybrid array solutions, where multiple antenna elements are driven by a common radio front end to form a beam along a specific angle in order to maximize the beamforming gain.

Beamforming Learning for mmWave Communication: Theory and Experimental Validation

no code implementations28 Dec 2019 ohaned Chraiti, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Ali Ghrayeb, Chadi Assi

We demonstrate that the training time required by the proposed scheme is only 5% of that of exhaustive search.


Directional Measurements in Urban Street Canyons from Macro Rooftop Sites at 28 GHz for 90% Outdoor Coverage

no code implementations1 Aug 2019 Jinfeng Du, Dmitry Chizhik, Reinaldo A. Valenzuela, Rodolfo Feick, Guillermo Castro, Mauricio Rodriguez, Tingjun Chen, Manav Kohli, Gil Zussman

Coverage in the street directly illuminated by a roof edge antenna is found to suffer an average excess loss of 11 dB relative to free space at 200 m, with empirical slope-intercept fit model representing the data with 7. 1 dB standard deviation.

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