Improving S-GPS sensitivity

摘要

Establishing the location fix of an E911 call from a CDMA mobile phone is typically accomplished using a built-in GPS device. Handset-based GPS receivers to date have mostly worked using a time-multiplexed scheme (TM-GPS), where the GPS signal and the telephone call signal sequentially toggles back and forth. This method is attractive because only one RF radio is working at a time and is easy to implement.