Lachapelle, Dr. GérardVagle, Niranjana2016-12-202016-12-2020162016http://hdl.handle.net/11023/3498This research focuses on performance improvement of antenna array based GNSS receivers under interference with focus on code and carrier phase measurements. Despite the remarkable amount of research on antenna array processing in wireless communications, application of these techniques to GNSS has not been studied extensively. In the case of GNSS, apart from interference mitigation, it is important to generate good estimates of code and carrier phase measurements. Array based processing techniques induce measurement distortions in the presence of interference, which is not acceptable for high precision carrier phase based applications, an issue that is not relevant for communications. An extensive analysis of GNSS measurement and position quality is performed. In order to analyze performance in a controlled environment, a novel method of simulating multi-antenna GNSS signals is proposed, with simulation of different types of electronic interference and multipath. The simulator is tested for high fidelity applications and is used to characterize measurement distortions. The performance of different beamforming techniques is evaluated in specular multipath conditions using simulated and actual data. It is shown that significant reduction in multipath errors can be obtained using a practically realizable antenna array by using the receiver processing approaches suggested herein. Calibration is the first step towards implementing many distortionless beamforming techniques. Yet, calibration using actual signals is challenging in multipath environments. A method is proposed and tested to reduce calibration parameter estimation errors in multipath environments. Finally, array based receiver measurement and position distortions are evaluated under different electronic interference using simulated and actual data.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Engineering--AerospaceEngineering--Electronics and ElectricalGeotechnologyGNSS interference mitigationDistortionless GNSS measurementsAntenna array based carrier phase positioningdoctoral thesis10.11575/PRISM/26613