Raghav Subbaraman

I completed my PhD from Department of Electrical and Computer Engineering at UC san Diego. I was advised by Prof. Dinesh Bharadia at the Wireless Communication, Sensing and Networking Group (WCSNG). My work was supported by grants from NSF, IARPA, and the Qualcomm Innovation Fellowship.

Before that, I was at Indian Institute of Technology Madras (IITM) for my B.Tech in Electrical Engineering. At IITM, I worked in Prof. Radha Krishna Ganti's lab and in the 5G Testbed project.

Email  /  GitHub  /  Google Scholar  /  LinkedIn

Research

My expertise and interests lie in applied wireless & networked systems research. In the past, I have worked on projects related to 5G ORAN and inter-operable networks, mmWave networks, and wireless security.

Spectrum awareness for next-generation networks

My PhD dissertation, titled “Spectrum awareness for next-generation networks” focuses on building tools and techniques to bridge spectrum awareness into communication networks. Through my research, I show how these tools can be used to improve spectrum usage, spectrum regulation, and wireless security. Shoot me an email if you want a copy.

Configurable LoRa testbed for reproducible PHY and MAC research

Open sourced an easy-to-use and set-up LoRa testbed developed as an offshoot from BSMA! If you are working on LoRa PHY or MAC layer research and need a testbed to test your systems, consider using this one! It works with all arduino-compatible devices and provides hooks into almost all PHY and MAC parameters.

Crescendo: Towards Wideband, Real-Time, High-Fidelity Spectrum Sensing Systems

In this paper, we discuss the importance of handling power dynamics in spectrum sensing. We then develop Crescendo, a stable sweep-spectrum sensor that can optimize the dynamic range of observation on a time-frequency selective basis.

mmFlexible: Flexible Directional Frequency Multiplexing for Multi-user mmWave Networks

BSMA: scalable LoRa networks using full duplex gateways

This work develops BSMA, a scalable LoRa MAC protocol that uses full duplex gateways to improve network capacity by 100% compared to CSMA in bursty loads. Implementing BSMA requires a full duplex LoRa gateway, which we develop in the 915 MHz ISM band. The implementation of a LoRa BSMA gateway is open source, and works with COTS LoRA devices.

A Hierarchical Self-Interference Canceller for Full-Duplex LPWAN Applications Achieving 52–70-dB RF Cancellation

Two beams are better than one: Towards Reliable and High Throughput mmWave Links

This work develops multi-beamforming as the enabler for reliable, high-throughput mmWave links. We also explore multi-beam maintenance in compliance with 5G-NR.

WiForce: Wireless Sensing and Localization of Contact Forces on a Space Continuum

mMobile: Building a mmWave Testbed to Evaluate and Address Mobility Effects

SweepSense: Sensing 5 GHz in 5 Milliseconds with Low-cost Radios

Design and source code from Jon Barron's website