Pseudolite interference mitigation and signal enhancements using an antenna array

Marathe, Thyagaraja; Daneshmand, Saeed

doi:10.1109/ipin.2015.7346961

Cited by 8 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…International Journal of Antennas and Propagation beamformer that incorporates a steering vector; this beamformer provides a distortionless response for carrier phase measurements [26]. The E-MPDR is an extended version of MPDR for space-time processing to increase the array degrees of freedom (DoF) [15,30]. Due to the presence of distortions from the temporal filter, this is considered a semi-distortionless method.…”

Section: Theoretical Analysis Of Distortions and Beamforming Methodsmentioning

confidence: 99%

Assessment of Measurement Distortions in GNSS Antenna Array Space-Time Processing

Marathe

Daneshmand

Lachapelle

2016

International Journal of Antennas and Propagation

Self Cite

View full text Add to dashboard Cite

Antenna array processing techniques are studied in GNSS as effective tools to mitigate interference in spatial and spatiotemporal domains. However, without specific considerations, the array processing results in biases and distortions in the cross-ambiguity function (CAF) of the ranging codes. Inspace-time processing (STP)the CAF misshaping can happen due to the combined effect of space-time processing and the unintentional signal attenuation by filtering. This paper focuses on characterizing these degradations for different controlled signal scenarios and for live data from an antenna array. The antenna array simulation method introduced in this paper enables one to perform accurate analyses in the field of STP. The effects of relative placement of the interference source with respect to the desired signal direction are shown using overall measurement errors and profile of the signal strength. Analyses of contributions from each source of distortion are conducted individually and collectively. Effects of distortions on GNSS pseudorange errors and position errors are compared forblind,semi-distortionless,anddistortionlessbeamforming methods. The results from characterization can be useful for designing low distortion filters that are especially important for high accuracy GNSS applications in challenging environments.

show abstract

Section: Theoretical Analysis Of Distortions and Beamforming Methodsmentioning

confidence: 99%

Assessment of Measurement Distortions in GNSS Antenna Array Space-Time Processing

Marathe

Daneshmand

Lachapelle

2016

International Journal of Antennas and Propagation

Self Cite

View full text Add to dashboard Cite

show abstract

“…In an experiment, 94% of the pseudolite positioning errors could be below 2 m when the errors introduced by multipath effects were controlled to be below 1 m [132]. In addition to a more sensible antenna design at the signal generation end, for example, two-array pseudolite antennas make the signal establish a long-distance link [133,134]. The ability to detect multiple paths at the receiver is another way to mitigate this error; for example, an area-based approach can detect more than 70% of the signal at low carrier-tonoise ratios [135].…”

Section: Multipathmentioning

confidence: 99%

Pseudolites to Support Location Services in Smart Cities: Review and Prospects

Liu,

Wang

et al. 2023

Smart Cities

View full text Add to dashboard Cite

The location service is an important part of the smart city. A unified location service for outdoor and indoor/overground and underground activity will assist the construction of smart cities. However, with different coordinate systems and data formats, it is difficult to unify various positioning technologies on the same basis. Global navigation satellite system (GNSS)-based positioning is the only way to provide absolute location under the Earth-centered, Earth-fixed coordinate system (ECEF). Increasing indoor and underground human activity places significant demand on location-based services but no GNSS signals are available there. Fortunately, a type of satellite that is indoors, known as pseudolite, can transmit GNSS-like ranging signals. Users can obtain their position by receiving ranging signals and their resection without adding or switching other sensors when they go from outdoors to indoors. To complete the outreach of the GNSS indoors and underground to support the smart city, how to adapt the pseudolite design and unify coordinate frames for linking to the GNSS remain to be determined. In this regard, we provide an overview of the history of the research and application of pseudolites, the research progress from both the system side and the user side, and the plans for pseudolite-based location services in smart cities.

show abstract

“…A significant number of publications are devoted to dependence of pseudolite navigation accuracy on various factors. Marathe et al 5 consider the construction of antenna devices and assess the impact of signals interference with the system's accuracy in two scenarios: both as an addition to GPS and autonomously. It is shown that in the case of autonomous use, the accuracy of positioning somewhat decreases, and the number of interference conflicts also decreases.…”

Section: Reference Analysis and Problem Statementmentioning

confidence: 99%

Model of an alternative navigation system for high-precision weapons

Savchenko

Tolubko

Беркман

et al. 2020

Journal of Defense Modeling & Simulation

View full text Add to dashboard Cite

The article explores the problem of alternative navigation support for high-precision weapons that use guidance based on signals from global navigation systems. It proposes the use of an autonomous navigation system replacing satellite navigation in the case where major Global Positioning System-like systems are unavailable. It suggests the idea and the model of a moving navigation field that can move along the weapon trajectory. The model of accuracy for the pseudolite navigation system uses the least squares method as its basis. The study looks into the accuracy parameters of the moving navigation field. The results of the study show the advantages of a moving field when compared with a stationary navigation field in case of autonomous use. This research also shows the possibility of using an autonomous system for Special Forces, search and rescue operations, and robotic and unmanned aerial, ground, and sea-based vehicles.

show abstract

Pseudolite interference mitigation and signal enhancements using an antenna array

Cited by 8 publications

References 7 publications

Assessment of Measurement Distortions in GNSS Antenna Array Space-Time Processing

Assessment of Measurement Distortions in GNSS Antenna Array Space-Time Processing

Pseudolites to Support Location Services in Smart Cities: Review and Prospects

Model of an alternative navigation system for high-precision weapons

Contact Info

Product

Resources

About