Interference Suppression in a GPS Receiver with 4 Element Array Design and Implementation of Beamforming Algorithms

Date

2016-04-14

Author

Dabak, Omer Can
Erdem, Fatih
Sonmez, Tolga
Alatan, Lale
Koç, Seyit Sencer

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

328
views

0
downloads

Global Positioning System (GPS) jammers add excessive noise to the received low power GPS signals and have capability to either weaken or completely destroy the positioning performance of GPS receivers for both civilian and military users. Researchers are actively working to develop GPS receiver systems resistant to interference sources. Our aim is to develop a system based on spatial filtering of jamming signals through the use of an active antenna array which is capable to control its radiation pattern by utilizing signal processing techniques. Array radiation pattern is controlled to maximize gain in satellite directions and to create null regions toward jammers. Adaptive beamforming methods provide necessary weighting coefficients to form desired radiation patterns using received data. In this paper, design, production and tests of an active antenna array is presented with implementation of adaptive beamforming algorithms using commercially available development boards.

Subject Keywords

GPS, Patch antenna, CRPA, Antijamming, Beamforming, Nullsteering

URI

https://hdl.handle.net/11511/52951

Conference Name

IEEE/ION Position, Location and Navigation Symposium (PLANS)

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Interference Supression in GPS Receivers using Spatial Filtering Erdem, Fatih; Dabak, Omer Can; Sonmez, Tolga; Alatan, Lale; Koç, Seyit Sencer (2016-05-19) GPS receiver operation can be interrupted by intentional/unintentional jammers even with low power levels. As the jammers become more abundant, protection of critical systems gains importance. In this work, it is aimed to suppress the GPS L1 band jammers using spatial filtering with antenna arrays. After experimental studies, it is achieved to suppress the jammers and to recover the GPS operation in real environment.
Design of smart antenna array for interference suppression in GPS Dabak, Ömer Can; Alatan, Lale; Koç, Seyit Sencer; Department of Electrical and Electronics Engineering (2016) GPS jammers add excessive noise to received low power GPS signals and have capability to weaken or completely destroy the positioning performance of GPS receivers. The most popular technique to overcome GPS jamming problem is suppression of jammers by using array signal processing techniques. In this thesis, a GPS anti-jamming system is constructed by designing an active antenna array and implementing adaptive beamforming techniques. This thesis mainly include the design of four element active circularly po...
Relay-Assisted Beamforming for Multicast Systems with Energy Harvesting Capability Demir, Özlem Tuğfe; Tuncer, Temel Engin (2016-05-19) In this paper, multi-group multicasting scenario is considered where single antenna sources transmit their own information to different groups of users with the help of single antenna relays. Users have energy harvesting capability, i.e., a part of the received signal is used for information decoding while the rest is used for energy harvesting. Beamforming is performed by the relays which use amplify-and-forward protocol. The design of complex relay coefficients and power splitting ratios for the users is ...
Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring Ozbey, Burak; Unal, Emre; Ertugrul, Hatice; Kurç, Özgür; Puttlitz, Christian M.; ERTÜRK, VAKUR BEHÇET; ALTINTAŞ, AYHAN; DEMİR, Hilmi Volkan (2014-01-01) We propose and demonstrate a wireless, passive, metamaterial-based sensor that allows for remotely monitoring submicron displacements over millimeter ranges. The sensor comprises a probe made of multiple nested split ring resonators (NSRRs) in a double-comb architecture coupled to an external antenna in its near-field. In operation, the sensor detects displacement of a structure onto which the NSRR probe is attached by telemetrically tracking the shift in its local frequency peaks. Owing to the NSRR's near-...
Satellite attitude determination based on GPS carrier phase measurements Özten, Evrim; Tekinalp, Ozan; Department of Aerospace Engineering (2013) With the developments in the GPS receiver technology, GPS receivers have been preferable equipments also for the space applications. In the early eighties, they have been used only for position, velocity and time determination. With the further improvements, it has been proven that they can provide not only the positioning information, but also attitude knowledge with the accuracy less than 1 degree. In this thesis, an estimation algorithm is developed in the MATLAB Simulink environment for the attitude det...

Citation Formats

O. C. Dabak, F. Erdem, T. Sonmez, L. Alatan, and S. S. Koç, “Interference Suppression in a GPS Receiver with 4 Element Array Design and Implementation of Beamforming Algorithms,” presented at the IEEE/ION Position, Location and Navigation Symposium (PLANS), Savannah, GA, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52951.