Radiolocation using AM broadcast signals: The role of signal propagation irregularities

Hall, Timothy D.

doi:10.1109/plans.2004.1309070

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Many complementary PNT sensors have been analyzed and evaluated by the community, including light detection and ranging (LIDARs), radars, electro-optical/infra-red (EO/IR) cameras, barometers, magnetometers, and many others. [2][3][4][5][6][7][8] Each of these sensors has advantages as well as different phenomena which limit their operation. For example, optical sensors could be obstructed by cloud cover or weather, whereas radio frequency (RF) sensors can penetrate cloud cover.…”

Section: Introductionmentioning

confidence: 99%

The PNT operating system (pntOS): a plug-in approach for rapid development and prototyping

Raquet,

Kauffman,

Schofield

et al. 2023

Open Architecture/Open Business Model Net-Centric Systems and Defense Transformation 2023

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The development of modular open system architecture (MOSA) approaches for Positioning, Navigation and Timing (PNT) systems is a critical need. In this paper we present pntOS, an open architecture for building PNT estimators that integrates seamlessly with other open architectures targeting related problems. The pntOS MOSA is designed to allow isolated development of plugins for navigation filter algorithms, sensor integration strategies, integrity approaches, and network buses. Critically, a developer who is a domain expert in a particular field (e.g. radar signal processing) can write a plugin incorporating their field of knowledge into pntOS in isolation, without needing to understand any other part of pntOS. Once a set of plugins has been developed, any particular plugin can be easily swapped with another plugin, allowing for rapid trade-space analysis and reconfiguration of systems at minimal cost. The pntOS MOSA is designed to support integration into embedded real-time systems, post-processed analysis, and Monte-Carlo simulations.

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Section: Introductionmentioning

confidence: 99%

The PNT operating system (pntOS): a plug-in approach for rapid development and prototyping

Raquet,

Kauffman,

Schofield

et al. 2023

Open Architecture/Open Business Model Net-Centric Systems and Defense Transformation 2023

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“…Signals of this type are often referred to as signals of opportunity and are generally communication signals for which the infrastructure has already been developed. Examples of signals of this type include digital television (DTV) [1], AM radio [2], [3], mobile cellular, and a variety of others. The use of SoOP does not come without challenges.…”

Section: Introductionmentioning

confidence: 99%

An analysis of advanced optimization algorithms for multiuser cooperative navigation

Enright

2010

IEEE/ION Position, Location and Navigation Symposium

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Navigation in low signal-to-noise ratio (SNR) environments continues to be an extremely challenging problem for GNSS. Effects such as multipath fading, shadowing, jamming of the waveform not only greatly limit the navigation accuracy, but also increase the outage probability that occurs when the received signal level falls below the minimum threshold. Newer navigation approaches have focused on employing terrestrial signals that maintain higher signal power such as digital television (DTV), cellular, etc. These are referred to as signals of opportunity (SoOP). The focus of this research is using these signals in a time difference of arrival (TDOA) cooperative navigation network. A major problem arises with relation to convergence of the positioning algorithm for this type of network. To address this problem, our research studies this problem from a different perspective. Here we will pose the problem as a convex optimization problem and address it as such. The main idea being that if the problem is structured in this form, we can use this well understood area to develop algorithms for faster convergence with respect to cooperative navigation. As such, this research is a combination of analytical analysis, algorithm development, and simulation results that describe performance under certain conditions.

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“…One of the earliest attempts and using SoOP was with relation to AM radio. It was shown in [1] that AM radio has some advantageous properties but is susceptible to multiple sources of interference from overhead power lines to ground wave propagation. It also is subject to integer ambiguity.…”

Section: Introductionmentioning

confidence: 99%

A signals of opportunity based cooperative navigation network

Enright

Kurby

2009

Proceedings of the IEEE 2009 National Aerospace &Amp; Electronics Conference (NAECON)

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With the advent of advanced wireless standards has come the ability to address more sophisticated problems. One such issue is to provide robust navigation in challenging environments. Our approach to develop a signals of opportunity (SoOP) based cooperative navigation network that has the potential to provide improved performance and extend coverage under a variety of difficult conditions from jamming to multipath fading. Under the premise that GPS is not always available, we employ SoOP as the core of this radionavigation system. A critical advantage of signals of opportunity is that they are more abundant and of significantly higher received signal power than other GNSS signals. There are many signals that are available but not all meet the requirements of robust navigation. Of particular importance are digital television (DTV), AM radio, and 3G cellular signals. Our basic premise is to implement these signals to provide geolocation capability using time difference of arrival (TDOA) which requires cooperation among users. We extend these concepts further to the development of a cooperative network that can be used to provide coverage to users outside the range of the navigation signals. We also demonstrate that cooperation can be used to mitigate the effects of multipath fading and provide simulation results.

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Radiolocation using AM broadcast signals: The role of signal propagation irregularities

Cited by 8 publications

References 3 publications

The PNT operating system (pntOS): a plug-in approach for rapid development and prototyping

The PNT operating system (pntOS): a plug-in approach for rapid development and prototyping

An analysis of advanced optimization algorithms for multiuser cooperative navigation

A signals of opportunity based cooperative navigation network

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