METHOD AND SYSTEM FOR SHARING AN OSCILLATOR FOR PROCESSING CELLULAR RADIO SIGNALS AND GNSS RADIO DATA SIGNALS BY DEFERRING AFC CORRECTIONS
First Claim
1. A method for communication, the method comprising:
- performing by one or more processors and/or circuits in a global navigation satellite system (GNSS) enabled mobile device, said one or more processors and/or circuits comprising a crystal oscillator and an automatic frequency correction (AFC) circuit;
sharing said crystal oscillator between processing of cellular radio signals and processing of GNSS data messages, wherein said sharing comprises;
determining time intervals within a time period corresponding to a frame of said GNSS data message for AFC; and
controlling said AFC based on said determined time intervals and a clock reference associated with said cellular radio signals.
4 Assignments
0 Petitions
Accused Products
Abstract
A global navigation satellite system (GNSS) enabled mobile device comprising a crystal oscillator and an automatic frequency correction (AFC) circuit may be operable to share the crystal oscillator between processing of cellular radio signals and processing of GNSS data messages. The GNSS enabled mobile device may be operable to enforce an AFC correction when the crystal oscillator drifts beyond a specific frequency error. The AFC correction may be allowed during time intervals corresponding to GNSS words at which decoding of these words is not required. The GNSS enabled mobile device may be operable to disable the AFC correction during time intervals associated with decoding of words while the crystal oscillator may drift within the specific frequency error range. After the decoding of one or more of words is completed, the AFC correction may be allowed during the time intervals corresponding to these words.
-
Citations
20 Claims
-
1. A method for communication, the method comprising:
performing by one or more processors and/or circuits in a global navigation satellite system (GNSS) enabled mobile device, said one or more processors and/or circuits comprising a crystal oscillator and an automatic frequency correction (AFC) circuit; sharing said crystal oscillator between processing of cellular radio signals and processing of GNSS data messages, wherein said sharing comprises; determining time intervals within a time period corresponding to a frame of said GNSS data message for AFC; and controlling said AFC based on said determined time intervals and a clock reference associated with said cellular radio signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
11. A system for communication, the system comprising:
one or more processors and/or circuits for use in a global navigation satellite system (GNSS) enabled mobile device, wherein said one or more processors and/or circuits comprise a crystal oscillator and an automatic frequency correction (AFC) circuit, and said one or more processors and/or circuits are operable to; share said crystal oscillator between processing of cellular radio signals and processing of GNSS data messages, and said sharing comprises; determining time intervals within a time period corresponding to a frame of said GNSS data message for AFC; and controlling said AFC based on said determined time intervals and a clock reference associated with said cellular radio signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification