| 摘要 |
The invention concerns a method to determine approximate Doppler to assist a mobile system (375) having an SPS receiver (376) and a communication transceiver (378) in communication with a cell site of a cellular communication system, the method comprising:
- determining an approximate location of the SPS receiver, said approximate location being determined using:
o a location of the cell site in communication with the mobile system or
o a location of a cellular service area including the cell site;
- determining an approximate Doppler for at least one SPS satellite relative to said SPS receiver, said approximate Doppler being determined based on said approximate location;
- transmitting said approximate Doppler to the mobile system to be used by said SPS receiver. |
