9 citations · 23 across the 12 of their papers we have counts for
13 papers
Sub-Resolution mmWave FMCW Radar-based Touch Localization using Deep Learning
Raghunandan M. Rao, Amit Kachroo, Koushik A. Manjunatha +2
Touchscreen-based interaction on display devices are ubiquitous nowadays. However, capacitive touch screens, the core technology that enables its widespread use, are prohibitively…
Iterative RNDOP-Optimal Anchor Placement for Beyond Convex Hull ToA-based Localization: Performance Bounds and Heuristic Algorithms
Raghunandan M. Rao, Don-Roberts Emenonye
Localizing targets outside the anchors' convex hull is an understudied but prevalent scenario in vehicle-centric, UAV-based, and self-localization applications. Considering such sc…
Underlay Radar-Massive MIMO Spectrum Sharing: Modeling Fundamentals and Performance Analysis
Raghunandan M. Rao, Harpreet S. Dhillon, Vuk Marojevic +1
In this work, we study underlay radar-massive MIMO cellular coexistence in LoS/near-LoS channels, where both systems have 3D beamforming capabilities. Using mathematical tools from…
Semi-Blind Post-Equalizer SINR Estimation and Dual CSI Feedback for Radar-Cellular Coexistence
Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
Current cellular systems use pilot-aided statistical-channel state information (S-CSI) estimation and limited feedback schemes to aid in link adaptation and scheduling decisions. H…
Probability of Pilot Interference in Pulsed Radar-Cellular Coexistence: Fundamental Insights on Demodulation and Limited CSI Feedback
Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
This paper considers an underlay pulsed radar-cellular spectrum sharing scenario, where the cellular system uses pilot-aided demodulation, statistical channel state information (S-…
Analysis of Worst-Case Interference in Underlay Radar-Massive MIMO Spectrum Sharing Scenarios
Raghunandan M. Rao, Harpeet S. Dhillon, Vuk Marojevic +1
In this paper, we consider an underlay radar-massive MIMO spectrum sharing scenario in which massive MIMO base stations (BSs) are allowed to operate outside a circular exclusion zo…
Analysis of Non-Pilot Interference on Link Adaptation and Latency in Cellular Networks
Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
Modern wireless systems such as the Long-Term Evolution (LTE) and 5G New Radio (5G NR) use pilot-aided SINR estimates to adapt the transmission mode and the modulation and coding s…
Measuring Hardware Impairments with Software-Defined Radios
Vuk Marojevic, Aditya V. Padaki, Raghunandan M. Rao +1
This Innovative Practice Full Paper introduces a novel tool for educating electrical engineering students about hardware impairments in wireless communications. A radio frequency (…
Rate-Maximizing OFDM Pilot Patterns for UAV Communications in Nonstationary A2G Channels
Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
In this paper, we propose and evaluate rate-maximizing pilot configurations for Unmanned Aerial Vehicle (UAV) communications employing OFDM waveforms. OFDM relies on pilot symbols…
5G NR Jamming, Spoofing, and Sniffing: Threat Assessment and Mitigation
Marc Lichtman, Raghunandan M. Rao, Vuk Marojevic +2
In December 2017, the Third Generation Partnership Project (3GPP) released the first set of specifications for 5G New Radio (NR), which is currently the most widely accepted 5G cel…
Adaptive Pilot Patterns for CA-OFDM Systems in Nonstationary Wireless Channels
Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
In this paper, we investigate the performance gains of adapting pilot spacing and power for Carrier Aggregation (CA)-OFDM systems in nonstationary wireless channels. In current mul…
LTE PHY Layer Vulnerability Analysis and Testing Using Open-Source SDR Tools
Raghunandan M. Rao, Sean Ha, Vuk Marojevic +1
This paper provides a methodology to study the PHY layer vulnerability of wireless protocols in hostile radio environments. Our approach is based on testing the vulnerabilities of…
Performance Analysis of a Mission-Critical Portable LTE System in Targeted RF Interference
Vuk Marojevic, Raghunandan M. Rao, Sean Ha +1
Mission-critical wireless networks are being up-graded to 4G long-term evolution (LTE). As opposed to capacity, these networks require very high reliability and security as well as…