Title :
Design of an Assisted GPS Receiver and its Performance Analysis
Author :
Lim, Deok Won ; Lee, Sang Jeong ; Cho, Deuk Jae
Author_Institution :
Dept. of Electron. Eng., Chungnam Nat. Univ., Daejeon
Abstract :
Demands on the indoor positioning capability is being increased. The assisted GPS (AGPS) needs the enhanced correlator scheme and the assistance information to acquire the weak GPS signal with strength below -150dBm within 2 ~ 3 seconds. This paper designs the AGPS receiver with an efficient digital correlator scheme that is able to reduce the squaring loss for weak signal acquisition. In order to evaluate the performance of the correlator scheme, this paper shows the success rates of signal acquisition under various environments. Finally, the performance of the designed receiver is analyzed with positioning accuracy and TTFF using assistance information from CDMA network of the cell phone
Keywords :
Global Positioning System; cellular radio; code division multiple access; radio receivers; signal detection; CDMA network; assistance information; assisted GPS receiver; cell phone; digital correlator scheme; indoor positioning capability; reduced squaring loss; weak GPS signal; weak signal acquisition; Correlators; Design engineering; Global Positioning System; Information analysis; Multiaccess communication; Performance analysis; RF signals; Radio frequency; Signal design; Signal processing;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.377931
