Search Results for author: Jeffrey G. Andrews

Found 27 papers, 3 papers with code

Feasibility Analysis of In-Band Coexistence in Dense LEO Satellite Communication Systems

no code implementations30 Nov 2023 Eunsun Kim, Ian P. Roberts, Jeffrey G. Andrews

We carefully model and study the potential downlink interference between the two systems and investigate how strategic satellite selection may be used by Kuiper to serve its ground users while also protecting Starlink ground users.

Forecaster-aided User Association and Load Balancing in Multi-band Mobile Networks

no code implementations23 Jan 2023 Manan Gupta, Sandeep Chinchali, Paul Varkey, Jeffrey G. Andrews

Cellular networks are becoming increasingly heterogeneous with higher base station (BS) densities and ever more frequency bands, making BS selection and band assignment key decisions in terms of rate and coverage.

Model Predictive Control Reinforcement Learning (RL)

Spatial and Statistical Modeling of Multi-Panel Millimeter Wave Self-Interference

no code implementations14 Oct 2022 Ian P. Roberts, Aditya Chopra, Thomas Novlan, Sriram Vishwanath, Jeffrey G. Andrews

Characterizing self-interference is essential to the design and evaluation of in-band full-duplex communication systems.

STEER: Beam Selection for Full-Duplex Millimeter Wave Communication Systems

no code implementations15 Jul 2022 Ian P. Roberts, Aditya Chopra, Thomas Novlan, Sriram Vishwanath, Jeffrey G. Andrews

Modern millimeter wave (mmWave) communication systems rely on beam alignment to deliver sufficient beamforming gain to close the link between devices.

Downlink Analysis and Evaluation of Multi-Beam LEO Satellite Communication in Shadowed Rician Channels

no code implementations14 Jul 2022 Eunsun Kim, Ian P. Roberts, Jeffrey G. Andrews

The extension of wide area wireless connectivity to low-earth orbit (LEO) satellite communication systems demands a fresh look at the effects of in-orbit base stations, sky-to-ground propagation, and cell planning.

LoneSTAR: Analog Beamforming Codebooks for Full-Duplex Millimeter Wave Systems

no code implementations22 Jun 2022 Ian P. Roberts, Sriram Vishwanath, Jeffrey G. Andrews

This work develops LoneSTAR, a novel enabler of full-duplex millimeter wave (mmWave) communication systems through the design of analog beamforming codebooks.

Beamformed Self-Interference Measurements at 28 GHz: Spatial Insights and Angular Spread

no code implementations15 Jun 2022 Ian P. Roberts, Aditya Chopra, Thomas Novlan, Sriram Vishwanath, Jeffrey G. Andrews

We present measurements and analysis of self-interference in multi-panel millimeter wave (mmWave) full-duplex communication systems at 28 GHz.

Over-the-Air Design of GAN Training for mmWave MIMO Channel Estimation

1 code implementation25 May 2022 Akash Doshi, Manan Gupta, Jeffrey G. Andrews

More importantly, our proposed framework has the potential to be trained online using real noisy pilot measurements, is not restricted to a specific channel model and can even be utilized for a federated OTA design of a dataset generator from noisy data.

28 GHz Phased Array-Based Self-Interference Measurements for Millimeter Wave Full-Duplex

no code implementations5 Mar 2022 Aditya Chopra, Ian P. Roberts, Thomas Novlan, Jeffrey G. Andrews

We present measurements of the 28 GHz self-interference channel for full-duplex sectorized multi-panel millimeter wave (mmWave) systems, such as integrated access and backhaul.

System-Level Analysis of Full-Duplex Self-Backhauled Millimeter Wave Networks

no code implementations10 Dec 2021 Manan Gupta, Ian P. Roberts, Jeffrey G. Andrews

We use this to characterize the network-level improvements seen when upgrading from conventional HD IAB nodes to FD ones by deriving closed-form expressions for (i) latency gain of FD-IAB over HD-IAB and (ii) the maximum number of hops that a HD- and FD-IAB network can support while satisfying latency and throughput targets.

Distributed Proximal Policy Optimization for Contention-Based Spectrum Access

no code implementations7 Oct 2021 Akash Doshi, Jeffrey G. Andrews

The increasing number of wireless devices operating in unlicensed spectrum motivates the development of intelligent adaptive approaches to spectrum access that go beyond traditional carrier sensing.

Fairness

A Deep Reinforcement Learning Framework for Contention-Based Spectrum Sharing

no code implementations5 Oct 2021 Akash Doshi, Srinivas Yerramalli, Lorenzo Ferrari, Taesang Yoo, Jeffrey G. Andrews

The increasing number of wireless devices operating in unlicensed spectrum motivates the development of intelligent adaptive approaches to spectrum access.

Fairness Q-Learning +2

Combining Contention-Based Spectrum Access and Adaptive Modulation using Deep Reinforcement Learning

no code implementations24 Sep 2021 Akash Doshi, Jeffrey G. Andrews

The use of unlicensed spectrum for cellular systems to mitigate spectrum scarcity has led to the development of intelligent adaptive approaches to spectrum access that improve upon traditional carrier sensing and listen-before-talk methods.

Fairness reinforcement-learning +1

Downlink Analysis of LEO Multi-Beam Satellite Communication in Shadowed Rician Channels

no code implementations29 Jul 2021 Eunsun Kim, Ian P. Roberts, Peter A. Iannucci, Jeffrey G. Andrews

The coming extension of cellular technology to base-stations in low-earth orbit (LEO) requires a fresh look at terrestrial 3GPP channel models.

Learning Site-Specific Probing Beams for Fast mmWave Beam Alignment

no code implementations28 Jul 2021 Yuqiang Heng, Jianhua Mo, Jeffrey G. Andrews

Beam alignment - the process of finding an optimal directional beam pair - is a challenging procedure crucial to millimeter wave (mmWave) communication systems.

Millimeter Wave Analog Beamforming Codebooks Robust to Self-Interference

no code implementations27 May 2021 Ian P. Roberts, Hardik B. Jain, Sriram Vishwanath, Jeffrey G. Andrews

This paper develops a novel methodology for designing analog beamforming codebooks for full-duplex millimeter wave (mmWave) transceivers, the first such codebooks to the best of our knowledge.

Wideband Channel Estimation with A Generative Adversarial Network

no code implementations22 Dec 2020 Eren Balevi, Jeffrey G. Andrews

Communication at high carrier frequencies such as millimeter wave (mmWave) and terahertz (THz) requires channel estimation for very large bandwidths at low SNR.

Generative Adversarial Network

Hybrid Beamforming for Millimeter Wave Full-Duplex under Limited Receive Dynamic Range

no code implementations21 Dec 2020 Ian P. Roberts, Jeffrey G. Andrews, Sriram Vishwanath

To prevent self-interference from saturating the receiver of a full-duplex device having limited dynamic range, our design addresses saturation on a per-antenna and per-RF chain basis.

DeepWiPHY: Deep Learning-based Receiver Design and Dataset for IEEE 802.11ax Systems

no code implementations19 Oct 2020 Yi Zhang, Akash Doshi, Rob Liston, Wai-tian Tan, Xiaoqing Zhu, Jeffrey G. Andrews, Robert W. Heath

In this work, we develop DeepWiPHY, a deep learning-based architecture to replace the channel estimation, common phase error (CPE) correction, sampling rate offset (SRO) correction, and equalization modules of IEEE 802. 11ax based orthogonal frequency division multiplexing (OFDM) receivers.

Millimeter Wave Full-Duplex Radios: New Challenges and Techniques

no code implementations13 Sep 2020 Ian P. Roberts, Jeffrey G. Andrews, Hardik B. Jain, Sriram Vishwanath

Equipping millimeter wave (mmWave) systems with full-duplex capability would accelerate and transform next-generation wireless applications and forge a path for new ones.

Management

High Dimensional Channel Estimation Using Deep Generative Networks

no code implementations24 Jun 2020 Eren Balevi, Akash Doshi, Ajil Jalal, Alexandros Dimakis, Jeffrey G. Andrews

This paper presents a novel compressed sensing (CS) approach to high dimensional wireless channel estimation by optimizing the input to a deep generative network.

Vocal Bursts Intensity Prediction

Deep Learning Predictive Band Switching in Wireless Networks

1 code implementation2 Oct 2019 Faris B. Mismar, Ahmad AlAmmouri, Ahmed Alkhateeb, Jeffrey G. Andrews, Brian L. Evans

Our proposed classifier-based band switching policy instead exploits spatial and spectral correlation between radio frequency signals in different bands based on knowledge of the UE location.

Autoencoder-Based Error Correction Coding for One-Bit Quantization

no code implementations24 Sep 2019 Eren Balevi, Jeffrey G. Andrews

It is empirically shown that this design gives nearly the same performance as to the hypothetically perfectly trained autoencoder, and we also provide a theoretical proof of why that is so.

Quantization

Online Antenna Tuning in Heterogeneous Cellular Networks with Deep Reinforcement Learning

no code implementations15 Mar 2019 Eren Balevi, Jeffrey G. Andrews

Our results illustrate that the proposed algorithm approaches the performance of the multi-agent RL, which requires millions of trials, with hundreds of online trials, assuming relatively low environmental dynamics, and performs much better than a single agent RL.

Q-Learning reinforcement-learning +1

Unified Analysis of HetNets using Poisson Cluster Process under Max-Power Association

1 code implementation5 Dec 2018 Chiranjib Saha, Harpreet S. Dhillon, Naoto Miyoshi, Jeffrey G. Andrews

Owing to its flexibility in modeling real-world spatial configurations of users and base stations (BSs), the Poisson cluster process (PCP) has recently emerged as an appealing way to model and analyze heterogeneous cellular networks (HetNets).

Information Theory Networking and Internet Architecture Information Theory

One-Bit OFDM Receivers via Deep Learning

no code implementations2 Nov 2018 Eren Balevi, Jeffrey G. Andrews

For channel estimation (using pilots), we design a novel generative supervised deep neural network (DNN) that can be trained with a reasonable number of pilots.

Quantization

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