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Abstract
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Article Information:
GPS Jamming: Strengthening Anti Jam GPS System with Adaptive Phase Only Nulling Using Cuckoo Search
V. Thyagarajan and S. Kaja Mohideen
Corresponding Author: V. Thyagarajan
Submitted: May 31, 2014
Accepted: June 20, 2014
Published: August 05, 2014 |
Abstract:
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Global Positioning System (GPS) signals are spread spectrum, modulated with very low average power caused by background noise. Signal received is mostly 165 dB down than thermal noise level. Such signals are easily jammed either through intentional noise sources (jammer) or unintentionally from broadcasting stations harmonics or other out of band sources. This study proposes to reveal how a nulling antenna with adaptive spatial filtering technique can efficiently mitigate intentional and non-intentional interference. A beam forming antenna array is an antennas set whose outputs are weighted by complex values and combined form array output. The complex valued weights effect is to steer the array pattern’s main lobes to desired directions which may be unknown and hence antenna weights are adjusted adaptively till some array performance measure is improved, revealing proper lobe or null placement. This study proposes a Cuckoo Search (CS) algorithm based new optimization method for multiple interference cancellation design that increases gain to desired signal and improves jamming rejection performance.
Key words: Anti-jamming, Cuckoo Search (CS), Global Positioning System (GPS), jamming, null steering, ,
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Cite this Reference:
V. Thyagarajan and S. Kaja Mohideen, . GPS Jamming: Strengthening Anti Jam GPS System with Adaptive Phase Only Nulling Using Cuckoo Search. Research Journal of Applied Sciences, Engineering and Technology, (5): 679-686.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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