eprintid: 10051153 rev_number: 26 eprint_status: archive userid: 608 dir: disk0/10/05/11/53 datestamp: 2018-06-28 10:16:33 lastmod: 2021-09-30 22:34:29 status_changed: 2018-06-28 10:16:33 type: proceedings_section metadata_visibility: show creators_name: Chen, Q creators_name: Tan, B creators_name: Woodbridge, K creators_name: Chetty, K title: Doppler based detection of multiple targets in passive WiFi radar using undetermined blind source separation ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F46 divisions: F52 keywords: Passive Wi-Fi radar,, Multiple target detection, Undetermined Blind Source Separation, proximal alternating Linearized minimization note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Passive approaches for detecting and localizing people in wireless environments have attracted significant attention because of its diverse application in healthcare, security and robotics in recent years. However, within indoor environments multiple people moving in close proximity to each other often impedes the utility of such approaches. In this paper we present a new method for identifying multiple human targets in Wi-Fi passive radar systems using only a single receive channel to detect Doppler returns. The technique is based on tree-structure sparse underdetermined blind source separation and utilizes proximal alternating methods in a convex optimization field. Firstly, we show proof-of-principle simulation results for two targets moving within a typical indoor scenario and compare the results with those from the well-known independent component analysis (ICA). Secondly, we validate the simulation outputs using real-world experimental data. The results demonstrate the effectiveness of the proposed technique for device-free detection of multiple targets in the indoor wireless landscape. date: 2018-08-30 date_type: published publisher: International Conference on Radar 2018 official_url: https://radar2018.org/ oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1563912 lyricists_name: Chen, Qingchao lyricists_name: Chetty, Kevin lyricists_name: Tan, Bo lyricists_name: Woodbridge, Karl lyricists_id: CHENK14 lyricists_id: KCHET45 lyricists_id: BTANX50 lyricists_id: KWOOD71 actors_name: Chetty, Kevin actors_id: KCHET45 actors_role: owner full_text_status: public series: International Conference on Radar volume: 2018 place_of_pub: Brisbane, Australia event_title: International Conference on Radar 2018 event_location: Brisbane, Australia event_dates: 27 August 2018 - 30 August 2018 institution: International Conference on Radar 2018 book_title: Proceedings of the International Conference on Radar 2018 citation: Chen, Q; Tan, B; Woodbridge, K; Chetty, K; (2018) Doppler based detection of multiple targets in passive WiFi radar using undetermined blind source separation. In: Proceedings of the International Conference on Radar 2018. International Conference on Radar 2018: Brisbane, Australia. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10051153/1/Submitted%20Version.pdf