Android代码Déjà Vu Location Service

DéjàVu-ALocalRFBasedBackendThisisabackendforUnifiedNlpthatuseslocallyacquiredWLAN/WiFiAPandmobile/cellulartowerdatatoresolveuserlocation.Collectively,“WLAN/WiFiandmobile/cellular”signalswillbecalled“RFemitters”below.Conceptually,thisbackendconsistsoftwopa