{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101449"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101449","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"GPS multi-receiver direct position estimation for aerial applications","abstract":"Modern aviation safety increasingly depends on reliable GPS services, while signal degrading effects such as multipath and masking often occur during critical flight phases, such as take-off and landing. In this regard, we propose Multi-Receiver Direct Position Estimation (MR-DPE), which operates a network of DPE receivers to enhance GPS measurement certainty in degraded signal environments. A DPE receiver directly estimates navigation solutions in the PVT domain with a maximum-likelihood approach, bypassing the intermediate range measurements. Whereas prior works have shown the enhanced measurement certainty of DPE under weak signals, MR-DPE provides further improvement by leveraging the information redundancy and the geometric diversity provided by the network of receivers and antennas. We implemented MR-DPE using software-defined radio and conducted comprehensive, full-scale flight experiments, a first for DPE-related works. A wide range of flight profiles were explored, especially those prone to signal multipath and masking, and preliminary analyses were performed on the data collected to ensure the conceptual validity of MR-DPE.","abstract_html":"Modern aviation safety increasingly depends on reliable GPS services, while signal degrading effects such as multipath and masking often occur during critical flight phases, such as take-off and landing. In this regard, we propose Multi-Receiver Direct Position Estimation (MR-DPE), which operates a network of DPE receivers to enhance GPS measurement certainty in degraded signal environments. A DPE receiver directly estimates navigation solutions in the PVT domain with a maximum-likelihood approach, bypassing the intermediate range measurements. Whereas prior works have shown the enhanced measurement certainty of DPE under weak signals, MR-DPE provides further improvement by leveraging the information redundancy and the geometric diversity provided by the network of receivers and antennas. We implemented MR-DPE using software-defined radio and conducted comprehensive, full-scale flight experiments, a first for DPE-related works. A wide range of flight profiles were explored, especially those prone to signal multipath and masking, and preliminary analyses were performed on the data collected to ensure the conceptual validity of MR-DPE.","abstract_has_math":false,"creators":["Chu, Arthur Hsi-Ping"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Gao, Grace X"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-27T16:11:04Z","date_published":"2018-09-27T16:11:04Z","updated_at":"2026-07-22T22:24:40Z","subjects":["Global Navigation Satellite System (GNSS)","Global Positioning System (GPS)","Direct Positioning","Maximum Likelihood Estimation","GNSS receiver, Multi-Receiver"],"languages":["en"],"rights":["Copyright 2018 Arthur Hsi-Ping Chu"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101449","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Gao, Grace X"]},{"key":"dc:creator","label":"Author","values":["Chu, Arthur Hsi-Ping"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-27T16:11:04Z","2018-07-18","2018-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Global Navigation Satellite System (GNSS)","Global Positioning System (GPS)","Direct Positioning","Maximum Likelihood Estimation","GNSS receiver, Multi-Receiver"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2018 Arthur Hsi-Ping Chu"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101449"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Modern aviation safety increasingly depends on reliable GPS services, while signal degrading effects such as multipath and masking often occur during critical flight phases, such as take-off and landing. In this regard, we propose Multi-Receiver Direct Position Estimation (MR-DPE), which operates a network of DPE receivers to enhance GPS measurement certainty in degraded signal environments. A DPE receiver directly estimates navigation solutions in the PVT domain with a maximum-likelihood approach, bypassing the intermediate range measurements. Whereas prior works have shown the enhanced measurement certainty of DPE under weak signals, MR-DPE provides further improvement by leveraging the information redundancy and the geometric diversity provided by the network of receivers and antennas. We implemented MR-DPE using software-defined radio and conducted comprehensive, full-scale flight experiments, a first for DPE-related works. A wide range of flight profiles were explored, especially those prone to signal multipath and masking, and preliminary analyses were performed on the data collected to ensure the conceptual validity of MR-DPE.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2018-09-27 without embargo terms","The student, Arthur Chu, accepted the attached license on 2018-07-17 at 18:01.","The student, Arthur Chu, submitted this Thesis for approval on 2018-07-17 at 18:09.","This Thesis was approved for publication on 2018-07-18 at 08:31.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12110 on 2018-09-27 at 10:42:44","Made available in DSpace on 2018-09-27T16:11:04Z (GMT). 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A DPE receiver directly estimates navigation solutions in the PVT domain with a maximum-likelihood approach, bypassing the intermediate range measurements. Whereas prior works have shown the enhanced measurement certainty of DPE under weak signals, MR-DPE provides further improvement by leveraging the information redundancy and the geometric diversity provided by the network of receivers and antennas. We implemented MR-DPE using software-defined radio and conducted comprehensive, full-scale flight experiments, a first for DPE-related works. A wide range of flight profiles were explored, especially those prone to signal multipath and masking, and preliminary analyses were performed on the data collected to ensure the conceptual validity of MR-DPE.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2018-09-27 without embargo terms","The student, Arthur Chu, accepted the attached license on 2018-07-17 at 18:01.","The student, Arthur Chu, submitted this Thesis for approval on 2018-07-17 at 18:09.","This Thesis was approved for publication on 2018-07-18 at 08:31.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12110 on 2018-09-27 at 10:42:44","Made available in DSpace on 2018-09-27T16:11:04Z (GMT). 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