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Passive radar via LTE signals of opportunity
2014 IEEE International Conference on Communications Workshops (ICC), 2014Passive radars relying on signals of opportunity enable new applications based on stealth tracking of targets without the need of radar signals emissions. Long term evolution (LTE) base stations employing orthogonal frequency division multiplexing (OFDM) signals are excellent candidates as illuminators of opportunity thanks to their wide availability ...
BARTOLETTI, Stefania +2 more
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Modeling the Coherence of Scattered Signals of Opportunity
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019The reflection of radar echoes collected under both monostatic and bistatic configurations generally undergoes losses of coherence. These can be affected by many factors, depending on both the system features and the illuminated surface, and it should be properly considered for an accurate characterization of the scattering phenomenon.
Comite D. +3 more
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Signals of Opportunity Aided Inertial Navigation
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2016A signal of opportunity (SOP)-aided inertial navigation system (INS) framework provides various technical solutions to technical problems facing GNSS implementations. A mobile receiver, whether handheld or vehicle-mounted, has access to Global Navigation Satellite System (GNSS) signals, multiple unknown terrestrial SOPs, and IMU measurements, which are
Joshua J. Morales +2 more
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Positioning Based on Signals of Opportunity
IEEE Communications Letters, 2014A novel approach to opportunistic positioning based on timing measurements is presented. The asynchronous radio transmissions from fixed stations and from mobile GPS-equipped nodes are jointly exploited to cooperatively localize a blind node. To this end, a weighted least-squares (WLS) estimator is proposed; its effectiveness is illustrated via ...
COLUCCIA, ANGELO +2 more
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Ocean altimetry using wideband signals of opportunity
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Coastal altimetry plays a prominent role in measuring the total water-level envelope directly, and is one of the key measurements required by storm surge applications and services. It can also provide important information about the wave field, leading to development of more realistic wave models and therefore improving forecasts of wave setup and ...
Rashmi Shah +8 more
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Anomaly Detection Using WiFi Signals of Opportunity
2019 13th International Conference on Signal Processing and Communication Systems (ICSPCS), 2019Detection of changes in indoor areas and controlled environments is getting increasing interest in ambient intelligence and security. In this paper, we propose a radio-frequency (RF)based anomaly detector that, observing the spectrum received from signals of opportunity (SoOp) and exploiting machine learning (ML) techniques, is capable of revealing ...
Elia Favarelli +4 more
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Cooperative position location with signals of opportunity
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON), 2009When the reception of GPS signals becomes unreliable, an alternative is to explore signals of opportunity (SOOP) for positioning. Broadcast digital radio transmissions (e.g., digital TV signals) contain field and segment sync codes, which can be used for ranging even though it was not originally designed for so.
Chun Yang +4 more
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Investment as the Opportunity Cost of Dividend Signaling
The Accounting Review, 2021ABSTRACT We provide evidence that dividends signal sustainable earnings generated by assets-in-place for firms with weak investment opportunities. In the cross-section, both dividend levels and changes contain more earnings information among firms with weaker investment opportunities.
Zachary Kaplan, Gerardo Pérez-Cavazos
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Measurement of atmospheric refractivity using signals of opportunity
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012High-resolution numerical weather models require fine-scale (1–5 km) measurements of moisture fields over large areas (>20,000 km2). Existing techniques such as GPS are not able to meet these requirements. This paper discusses the feasibility of a novel method for measuring atmospheric refractivity by the opportunistic reception and processing of ...
R. J. Watson +3 more
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Airborne antenna array calibration with signals of opportunity
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013An approach is presented for in-situ calibration of an airborne antenna array using a signal of opportunity. In-situ calibration requires determining location of the unknown signal, the array's response in the direction of the signal, and the application of updates to the stored antenna response.
Andrew Kintz, Inder J. Gupta
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