3 citations · 5 across the 25 of their papers we have counts for
12 papers · 1 filter
Real-Time Multi-Target Detection and Tracking with mmWave 5G NR Waveforms on RFSoC
Xinyang Li, Hian Zing Voon, Vlad C. Andrei +5
We demonstrate a real-time implementation of multi-target detection and tracking using 5G New Radio (NR) physical downlink shared channel (PDSCH) waveform with 400 MHz bandwidth at…
When Data is the Algorithm: A Systematic Study and Curation of Preference Optimization Datasets
Aladin Djuhera, Farhan Ahmed, Swanand Ravindra Kadhe +3
Aligning large language models (LLMs) is a central objective of post-training, often achieved through reward modeling and reinforcement learning methods. Among these, direct prefer…
Variational Secret Common Randomness Extraction
Xinyang Li, Vlad C. Andrei, Peter J. Gu +3
This paper studies the problem of extracting common randomness (CR) or secret keys from correlated random sources observed by two legitimate parties, Alice and Bob, through public…
Fixing It in Post: A Comparative Study of LLM Post-Training Data Quality and Model Performance
Aladin Djuhera, Swanand Ravindra Kadhe, Syed Zawad +3
Recent work on large language models (LLMs) has increasingly focused on post-training and alignment with datasets curated to enhance instruction following, world knowledge, and spe…
"Don't Do That!": Guiding Embodied Systems through Large Language Model-based Constraint Generation
Amin Seffo, Aladin Djuhera, Masataro Asai +1
Recent advancements in large language models (LLMs) have spurred interest in robotic navigation that incorporates complex spatial, mathematical, and conditional constraints from na…
SafeCOMM: A Study on Safety Degradation in Fine-Tuned Telecom Large Language Models
Aladin Djuhera, Swanand Ravindra Kadhe, Farhan Ahmed +4
Fine-tuning large language models (LLMs) on telecom datasets is a common practice to adapt general-purpose models to the telecom domain. However, little attention has been paid to…
Computation of Capacity-Distortion-Cost Functions for Continuous Memoryless Channels
Xinyang Li, Ziyou Tang, Vlad C. Andrei +3
This paper aims at computing the capacity-distortion-cost (CDC) function for continuous memoryless channels, which is defined as the supremum of the mutual information between chan…
Exploiting Beamforming for Enforcing Semantic Secrecy in 5G NR mmWave Communications
Luis Torres-Figueroa, Johannes Voichtleitner, Ullrich J. Mönich +3
We experimentally investigate the performance of semantically-secure physical layer security (PLS) in 5G new radio (NR) mmWave communications during the initial cell search procedu…
Computing Capacity-Cost Functions for Continuous Channels in Wasserstein Space
Xinyang Li, Vlad C. Andrei, Ullrich J. Mönich +2
This paper investigates the problem of computing capacity-cost (C-C) functions for continuous channels. Motivated by the Kullback-Leibler divergence (KLD) proximal reformulation of…
SafeMERGE: Preserving Safety Alignment in Fine-Tuned Large Language Models via Selective Layer-Wise Model Merging
Aladin Djuhera, Swanand Ravindra Kadhe, Farhan Ahmed +2
Fine-tuning large language models (LLMs) is a common practice to adapt generalist models to specialized domains. However, recent studies show that fine-tuning can erode safety alig…
A Simultaneous Decoding Approach to Joint State and Message Communications
Xinyang Li, Yiqi Chen, Vlad C. Andrei +3
The capacity-distortion (C-D) trade-offs for joint state and message communications (JSMC) over single- and multi-user channels are investigated, where the transmitters have access…
SE(3)-Based Trajectory Optimization and Target Tracking in UAV-Enabled ISAC Systems
Dongxiao Xu, Xinyang Li, Vlad C. Andrei +3
This paper presents a novel approach to enhance sensing capabilities in UAV-enabled MIMO-OFDM ISAC systems by leveraging UAV mobility as a mono-static radar. By integrating uniform…