Patent ID: 8971921
Filing Date: 2015-03-03
Classification: G01S,H04W

Abstract:
1. A computer system comprising: a central processing unit; a detection module coupled to the central processing unit for detecting a plurality of base stations (i=1−n) neighboring the computer system; and a storage device coupled to the central processing unit for storing a programming code, and the programming code is utilized to instruct the central processing unit to process a method for a wireless communication system comprising a mobile device and the plurality of base stations, the method comprising: obtaining a geometric matrix as according to a plurality of relative distances between the mobile device and the plurality of base stations, wherein represents a position coordinate of the i th base station, ({circumflex over (x)},ŷ,{circumflex over (z)}) is utilized as a simplified position coordinate, and e i1 2 +e i2 2 +e i3 2 =1 is satisfied; obtaining a weighted matrix as according to the mobile device and the plurality of base stations, wherein σ i represents a covariance related to a corresponding one of the plurality of base stations, and k i represents a reciprocal value of each corresponding covariance; obtaining a weighted geometric dilution of precision (WGDOP) as WGDOP=√{square root over (tr(H choosing a plurality of selected base stations from the plurality of base stations according to the WGDOP closed form, so as to position the mobile device.