A Novel Space-Based AIS Receiver Architecture for Maritime Surveillance

2020 ◽  
pp. 249-254
Author(s):  
D. Mallikarjuna Reddy ◽  
S. Anuradha
Keyword(s):  
Maritime Surveillance ◽  
Receiver Architecture

scholarly journals Design and Experimental Characterization of a Discovery and Tracking System for Optical Camera Communications

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2925
Author(s):  
Antonio Mederos-Barrera ◽  
Cristo Jurado-Verdu ◽  
Victor Guerra ◽  
Jose Rabadan ◽  
Rafael Perez-Jimenez
Keyword(s):  
Tracking System ◽  
Region Of Interest ◽  
Experimental Methodology ◽  
Visible Light Communications ◽  
Spatial Features ◽  
Tracking Algorithms ◽  
Receiver Architecture ◽  
Vehicle Networks ◽  
Time Required ◽  
Static Conditions

Visible light communications (VLC) technology is emerging as a candidate to meet the demand for interconnected devices’ communications. However, the costs of incorporating specific hardware into end-user devices slow down its market entry. Optical camera communication (OCC) technology paves the way by reusing cameras as receivers. These systems have generally been evaluated under static conditions, in which transmitting sources are recognized using computationally expensive discovery algorithms. In vehicle-to-vehicle networks and wearable devices, tracking algorithms, as proposed in this work, allow one to reduce the time required to locate a moving source and hence the latency of these systems, increasing the data rate by up to 2100%. The proposed receiver architecture combines discovery and tracking algorithms that analyze spatial features of a custom RGB LED transmitter matrix, highlighted in the scene by varying the cameras’ exposure time. By using an anchor LED and changing the intensity of the green LED, the receiver can track the light source with a slow temporal deterioration. Moreover, data bits sent over the red and blue channels do not significantly affect detection, hence transmission occurs uninterrupted. Finally, a novel experimental methodology to evaluate the evolution of the detection’s performance is proposed. With the analysis of the mean and standard deviation of novel K parameters, it is possible to evaluate the detected region-of-interest scale and centrality against the transmitter source’s ideal location.

scholarly journals Towards Automatic Recognition of Wakes Generated by Dark Vessels in Sentinel-1 Images

2021 ◽  
Vol 13 (10) ◽  
pp. 1955
Author(s):  
Maria Daniela Graziano ◽  
Alfredo Renga
Keyword(s):  
Surface Film ◽  
A Priori ◽  
Ground Truth ◽  
Detection Performance ◽  
Sar Images ◽  
Ground Truth Data ◽  
Low Wind Speed ◽  
Maritime Surveillance ◽  
Strong Transition ◽  
Detection Capabilities

The recognition of wakes generated by dark vessels is a tremendous and interesting challenge in the field of maritime surveillance by Synthetic Aperture Radar (SAR) images. The paper aims at assessing the detection performance in different scenarios by processing Sentinel-1 SAR images along with ground truth data. Results confirm that the Radon-based approach is an effective technique for wake-based detection of dark vessels, and they lead to a deeper understanding of the effects of different sea and wind conditions. In general, the best applicative scenario is a marine image characterized by homogeneous sea clutter; the presence of natural surface film or strong transition from low wind speed areas to more windy zones worsen the detection performance. Nonetheless, the proposed approach features dark vessel detection capabilities by identifying their wakes, without any a priori knowledge of their positions.

Autonomous Technology and Dynamic Obligations: Uncrewed Maritime Vehicles and the Regulation of Maritime Military Surveillance in the Exclusive Economic Zone

2021 ◽  
pp. 1-30
Author(s):  
Simon MCKENZIE
Keyword(s):  
Legal Regime ◽  
Coastal State ◽  
Maritime Surveillance ◽  
Legal Obligations ◽  
Legal Implications ◽  
Exclusive Economic Zones ◽  
Dynamic Quality ◽  
Economic Zones ◽  
Environmental Interests ◽  
Autonomous Technology

Abstract The development of uncrewed maritime vehicles [UMVs] has the potential to increase the scale of military maritime surveillance in the exclusive economic zones of foreign coastal states. This paper considers the legal implications of the expanded use of UMVs for this purpose. It shows how features of the legal regime—namely how its application depends on determining the intent of a vessel's operation (to distinguish marine scientific research from military surveillance), as well the obligation to have due regard—have a “dynamic” quality that will pose a challenge to UMVs operated by autonomous technology. The legal obligations will require equipping UMVs with the capacity to communicate something about their identity, the purpose of their mission, and to be able to have some capacity to be responsive to the economic and environmental interests of the coastal state.

Mobile satellite reception with DVB-SH receiver architecture and performance

2013 ◽  
Vol 32 (4) ◽  
pp. 329-342 ◽  
Author(s):  
Amaia Añorga Gómez ◽  
Stefan Lipp ◽  
Martin Leyh ◽  
Bernhard Niemann
Keyword(s):  
Receiver Architecture ◽  
Mobile Satellite ◽  
And Performance

Optimized multistandard RF subsampling receiver architecture

2009 ◽  
Vol 8 (6) ◽  
pp. 2901-2909 ◽  
Author(s):  
R. Barrak ◽  
A. Ghazel ◽  
F. Ghannouchi
Keyword(s):  
Receiver Architecture

Proposed lidar receiver architecture for the CZMIL system

2010 ◽  
Author(s):  
Andy Payment ◽  
Viktor Feygels ◽  
Eran Fuchs
Keyword(s):  
Receiver Architecture

Integrated X Band Active Phased Array Radar for Maritime Surveillance

2021 ◽  
Author(s):  
Ramkumar Raghu ◽  
Nanditha Unnikrishnan ◽  
B Sree Kalyani ◽  
R Rajesh ◽  
Reena Sharma
Keyword(s):  
Phased Array ◽  
Maritime Surveillance ◽  
Phased Array Radar ◽  
X Band
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