{"id":1889,"date":"2017-08-11T11:40:54","date_gmt":"2017-08-11T11:40:54","guid":{"rendered":"https:\/\/www.beaconzone.co.uk\/blog\/?p=1889"},"modified":"2017-08-11T11:40:54","modified_gmt":"2017-08-11T11:40:54","slug":"research-paper-on-using-bluetooth-for-indoor-locating","status":"publish","type":"post","link":"https:\/\/www.beaconzone.co.uk\/blog\/research-paper-on-using-bluetooth-for-indoor-locating\/","title":{"rendered":"Research Paper on Using Bluetooth for Indoor Locating"},"content":{"rendered":"<p>There&#8217;s a paper by Mariusz Kaczmarek, Jacek Ruminski and Adam Bujnowski of Gdansk University of Technology on the <a href=\"https:\/\/annals-csis.org\/proceedings\/2016\/pliks\/501.pdf\" target=\"_blank\" rel=\"noopener\">Accuracy analysis of the RSSI BLE SensorTag signal for indoor localization purposes<\/a> (pdf).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1890\" src=\"https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/positionestimation.png\" alt=\"\" width=\"583\" height=\"570\" srcset=\"https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/positionestimation.png 583w, https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/positionestimation-300x293.png 300w\" sizes=\"(max-width: 583px) 85vw, 583px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1891\" src=\"https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/rssivsdistance.png\" alt=\"\" width=\"589\" height=\"454\" srcset=\"https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/rssivsdistance.png 589w, https:\/\/www.beaconzone.co.uk\/blog\/wp-content\/uploads\/2017\/08\/rssivsdistance-300x231.png 300w\" sizes=\"(max-width: 589px) 85vw, 589px\" \/><\/p>\n<p>They studied the radio signal from multiple Texas Instruments SensorTag CC2650 devices in order to determine if it could be used to determine location.<\/p>\n<p>They concluded:<\/p>\n<blockquote><p>&#8220;Given the large number of factors governing the received RSSI, calibration is unlikely to be able to compensate for all of<br \/>\nthem, leading us to conclude that there is an inherent limit to the accuracy of a BLE positioning system especially when multiple devices are used.&#8221;<\/p><\/blockquote>\n<p>They suggest:<\/p>\n<blockquote><p>&#8230;that instead of using a single RSSI measurement to estimate distance, try using the average or median value of N measurements collected on the same spot (at least N&gt;20) so that you can reduce the effect of small scale fading.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>There&#8217;s a paper by Mariusz Kaczmarek, Jacek Ruminski and Adam Bujnowski of Gdansk University of Technology on the Accuracy analysis of the RSSI BLE SensorTag signal for indoor localization purposes (pdf). They studied the radio signal from multiple Texas Instruments SensorTag CC2650 devices in order to determine if it could be used to determine location. &hellip; <a href=\"https:\/\/www.beaconzone.co.uk\/blog\/research-paper-on-using-bluetooth-for-indoor-locating\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Research Paper on Using Bluetooth for Indoor Locating&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,32,33,130,39],"tags":[],"_links":{"self":[{"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/posts\/1889"}],"collection":[{"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=1889"}],"version-history":[{"count":1,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/posts\/1889\/revisions"}],"predecessor-version":[{"id":1892,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/posts\/1889\/revisions\/1892"}],"wp:attachment":[{"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=1889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=1889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.beaconzone.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=1889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}