2024
conference-paper
OpenAlex
B. B. Hicks, Sabyasachi Biswas, Ajaya Dahal, Víctor M. González et autres
Radar-based technologies have become ubiquitous in recent years, playing vital roles in many civilian and military applications, ranging from navigation to electronic warfare. With the widespread adoption of these technologies, several notable challenges have emerged, especially concerning spectrum congestion and the complicated …
us
(code pays fourni par la source)
2024
conference-paper
OpenAlex
Ajaya Dahal, Sabyasachi Biswas, Sevgi Zübeyde Gürbüz, Ali Cafer Gürbüz
Researchers are exploring how radio frequency (RF) sensors can be used to create new interfaces and smart environments that respond to human movement. This technology has the potential to be used in things like gesture recognition or smart home systems. While there …
us
(code pays fourni par la source)
2024
conference-paper
OpenAlex
Ajaya Dahal, Sabyasachi Biswas, Sevgi Zübeyde Gürbüz, Ali Cafer Gürbüz
The use of radio-frequency (RF) sensors in systems centered around humans, such as human-computer interfaces or smart environments, is an emerging field that aims to recognize human motion in real-time. While various RF sensors such as radar, transceivers at various center frequencies …
us
(code pays fourni par la source)
2022
conference-paper
OpenAlex
Fahmida Islam, Jason Farmer, Ajaya Dahal, Bo Tang et autres
Mobile devices have distinct RF fingerprints, which are reflected by changes in the frequency of transmitted signals. The Short-Time Fourier Transform (STFT) is a suitable technique for evaluating this frequency content and thus identifying them. In this paper, we take advantage of …
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(code pays fourni par la source)
2022
conference-paper
OpenAlex
Walaa AlQwider, Ajaya Dahal, Vuk Marojevic
The main resource for providing wireless services is radio frequency (RF) spectrum. In order to explore new uses of spectrum shared among radio systems and services, field data needs to be collected. In this paper we design a testbed that can generate …
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(code pays fourni par la source)
2021
conference-paper
OpenAlex
Surya Kodipaka, Ajaya Dahal, Logan Smith, Nicholas Smith et autres
We consider the problem of accurately detecting signals from contraband WiFi devices. Source locations may be selected in a worst-case fashion from within an indoor structure, such as a correctional facility. The structure layout is known, but inaccessible prior to deployment, and …
us
(code pays fourni par la source)
2021
conference-paper
OpenAlex
Logan Smith, Nicolas P. Smith, Surya Kodipaka, Ajaya Dahal et autres
Wireless devices identify themselves using media access control (MAC) addresses which can be easily intercepted and mimicked by an adversary. Mobile devices also have a unique physical fingerprint represented by perturbations in the frequency of broadcasted signals caused by differences in the …
us
(code pays fourni par la source)
2021
conference-paper
OpenAlex
Nicolas P. Smith, Logan Smith, Surya Kodipaka, Ajaya Dahal et autres
Many correctional facilities suffer from the smuggling of cell phones and other wireless devices into prison walls. In order to locate these devices for confiscation, we must be able to map intercepted signals to indoor locations within a few meter radius. We …
us
(code pays fourni par la source)