R. H. Rahman  , N. Nowsheen  , M. A. Khan  , A.H. Khan  , 
    Locating Mobile Phones on a City Map Using SMS Technology,
    Asian Journal of Information Technology,
    Volume 6,Issue 8,
    2007,
    Pages 907-910,
    ISSN 1682-3915,
    ajit.2007.907.910,
    (https://makhillpublications.co/view-article.php?doi=ajit.2007.907.910)
    Abstract: Finding the location of a mobile phone is one of the crucial challenges in modern telecommunication system. This study  proposes a solution of locating a mobile phone on a city map using SMS (Short Message Service). This study intends to help mobile phone users to find out his/her location on a geographical map. The proposed method is GPS-free and it requires no additional technology to be added to existing mobile phones. It uses well-established algorithms to locate a mobile phone on a geographical map and then sends the position-on-a-map to the user mobile by an SMS.
    Keywords: Direction of Arrival (DoA);Received Signal Strength Indication (RSSI);Radio Direction Finding (RDF)