Acquisition of reflected GPS signals for remote sensing applications

Usman, Muhammad Arslan; Armitage, David

doi:10.1109/icast.2008.4747700

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Among many one fundamental parameter across which a remote sensing system is designed is the spatial resolution. In [16], [17], cross range and Doppler resolution is defined in meters and implemented using computer code. Whereas, reference [13] also presented equations of resolution for bi-static [16], based on the assumptions that the synthetic apertures and target areas are small, the transmitted signal is narrow band and has used the stop-and-go approximation.…”

Section: Gps Imagingmentioning

confidence: 99%

De-convolution and De-noising of SAR Based GPS Images Using Hybrid Particle Swarm Optimization

2023

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Synthetic aperture radar (SAR) imaging is an efficient strategy which exploits the properties of microwaves to capture images. A major concern in SAR imaging is the reconstruction of image from back scattered signals in the presence of noise. The reflected signal consist of more noise than the target signal and it is a challenging problem to reduce the noise in the collected signal for better reconstruction of an image. Current studies mostly focus on filtering techniques for noise removal. This can result in an undesirable point spread function causing extreme smearing effect in the desired image. In order to handle this problem, a computational technique, particle swarm optimization (PSO) is used for de-noising purpose and later the target performance is further improved by an amalgamation of Wiener filter. Moreover, to improve the de-noising performance we have exploited the singular value decomposition based morphological filtering. To justify the proposed improvements we have simulated the proposed techniques and results are compared with the conventional existing models. The proposed method revealed considerable decrease in mean square error compared to Wiener filter and PSO techniques. Quantitative analysis of image restoration quality are also presented in comparison with Wiener filter and PSO based on the improvement in signal to noise ratio and peak signal to noise ratio.

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Section: Gps Imagingmentioning

confidence: 99%

De-convolution and De-noising of SAR Based GPS Images Using Hybrid Particle Swarm Optimization

2023

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“…The GPS data used in this project has been acquired using custom made dual channel GPS data capturing device [8]. The GPS data was captured in Room E44b of Sackville street building of the University of Manchester.…”

Section: A Capturing Of Gps Datamentioning

confidence: 99%

Analysis and Mitigation of Tropospheric Error Effect on GPS Positioning Using Real GPS Data

Saleem¹,

Usman²

2014

IJEEE

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The GPS (Global Positioning System) is used for navigation and positioning purposes by a diverse set of users. The navigation solution provided by a commercial GPS receiver is subject to errors contributed by various sources. These sources of errors in GPS navigation (e.g. satellite clock, receiver clock, atmospheric and multipath errors etc.) induce biases in the measurement of pseudo range and degrade system accuracy. In the current research endeavor the atmospheric and troposphere error sources and its impact on GPS position accuracy is critically analyzed. In this regard a tropospheric error correction model is simulated on real captured GPS data and results are analyzed. 

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Low-cost dual polarized GPS antenna for effective signal acquisition in multipath environment

Yin

Tiwari

Johnston

2017

2017 European Navigation Conference (ENC)

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Acquisition of reflected GPS signals for remote sensing applications

Cited by 4 publications

References 6 publications

De-convolution and De-noising of SAR Based GPS Images Using Hybrid Particle Swarm Optimization

De-convolution and De-noising of SAR Based GPS Images Using Hybrid Particle Swarm Optimization

Analysis and Mitigation of Tropospheric Error Effect on GPS Positioning Using Real GPS Data

Low-cost dual polarized GPS antenna for effective signal acquisition in multipath environment

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