Simultaneous GPS System Analysis and Sensitivity Improvement for Single-Antenna, Tri-Band, Dual-Mode CDMA Handsets

Won Kyu Kim; Chien, Allen
November 2007
Portable Design;Nov2007, Vol. 13 Issue 11, p20
The article examines the Simultaneous Global Positioning System (S-GPS) system analysis and sensitivity improvement for single antenna, tri-band and dual mode code division multiple access (CDMA) handsets. In S-GPS, both GPS and CDMA radios simultaneously operate. This provides -4 decibel improved sensitivity over TM-GPS due to its dedicated GPS receiver chain and longer satellite search times. This sensitivity enhancement is especially critical to compensate for the increasing use of internal antennas, which tend to have reduced sensitivity versus their external counterparts.


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