CILoS is an indoor localization system based on CDMA mobile phone signal \ufb01ngerprinting. CDMA networks vary their transmission power to accommodate \ufb02uctuations in network load. This affects signal intensity and therefore limits the practicality of traditional \ufb01ngerprintingapproachesbased on receiver signal strength (RSSI) measurements. Instead, CILoS uses \ufb01ngerprints of signal delay that are robust to cell resizing. We demonstrate that CILoS achieves a median accuracy of 5 meters, and compares favourably to RSSI \ufb01ngerprinting systems. We highlight the signi\ufb01cance of wide \ufb01ngerprints, constructed through scanning multiple channels, for achieving high localization accuracy. We also show that our system can accurately differentiate between \ufb02oors of a multi\ufb02oor building.<\/p>\n","protected":false},"excerpt":{"rendered":"
CILoS is an indoor localization system based on CDMA mobile phone signal \ufb01ngerprinting. CDMA networks vary their transmission power to accommodate \ufb02uctuations in network load. This affects signal intensity and therefore limits the practicality of traditional \ufb01ngerprintingapproachesbased on receiver signal strength (RSSI) measurements. Instead, CILoS uses \ufb01ngerprints of signal delay that are robust to cell […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","footnotes":""},"msr-content-type":[3],"msr-research-highlight":[],"research-area":[13547],"msr-publication-type":[193716],"msr-product-type":[],"msr-focus-area":[],"msr-platform":[],"msr-download-source":[],"msr-locale":[268875],"msr-post-option":[],"msr-field-of-study":[],"msr-conference":[],"msr-journal":[],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-160035","msr-research-item","type-msr-research-item","status-publish","hentry","msr-research-area-systems-and-networking","msr-locale-en_us"],"msr_publishername":"","msr_edition":"Proceedings of the 10th International Conference on Ubiquitous Computing 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