Apparatus and method for receiving GPS signals in a mobile terminal
First Claim
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1. An apparatus for receiving global positioning system (GPS) signals in a mobile terminal, comprising:
- a first radio frequency (RF) receiver for receiving a first RF signal comprising basic information about a GPS satellite over a mobile communication network;
a first baseband processor for acquiring the basic information and system time of the mobile communication network based on the output of the first RF receiver;
a second RF receiver for receiving a second RF signal comprising navigation data from the GPS satellite;
a navigation data bit estimator for generating sensitivity assistance (SA) data by using the basic information and the system time, the SA data being a replica of the total information bits of the navigation data;
a second baseband processor for generating integrated samples by correlating a pseudo-random noise (PRN) code with the second RF signal and coherent-integrating the correlation result by using the SA data; and
a signal detector for calculating a position solution of the mobile terminal by using the integrated samples received from the second baseband processor.
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Abstract
An apparatus and method is provided for increasing GPS reception sensitivity in a mobile terminal having a mobile-based GPS positioning function. A GPS receiver in the mobile terminal generates SA data by using basic information about GPS satellites and system time. Here, the SA data is a replica of the total information bits of navigation data. The GPS receiver then correlates a PRN code with a GPS signal and coherent-integrating the correlation result by using the SA data. It calculates a position solution of the mobile terminal by using the integrated samples.
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Citations
18 Claims
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1. An apparatus for receiving global positioning system (GPS) signals in a mobile terminal, comprising:
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a first radio frequency (RF) receiver for receiving a first RF signal comprising basic information about a GPS satellite over a mobile communication network;
a first baseband processor for acquiring the basic information and system time of the mobile communication network based on the output of the first RF receiver;
a second RF receiver for receiving a second RF signal comprising navigation data from the GPS satellite;
a navigation data bit estimator for generating sensitivity assistance (SA) data by using the basic information and the system time, the SA data being a replica of the total information bits of the navigation data;
a second baseband processor for generating integrated samples by correlating a pseudo-random noise (PRN) code with the second RF signal and coherent-integrating the correlation result by using the SA data; and
a signal detector for calculating a position solution of the mobile terminal by using the integrated samples received from the second baseband processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of receiving global positioning system (GPS) signals in a mobile terminal, comprising the steps of:
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receiving at a first radio frequency (RF) receiver a first RF signal comprising basic information about a GPS satellite over a mobile communication network;
acquiring the basic information and system time of the mobile communication network based on the output of the first RF receiver;
receiving a second RF signal comprising navigation data from the GPS satellite;
generating sensitivity assistance (SA) data by using the basic information and the system time, the SA data being a replica of the total information bits of the navigation data;
generating integrated samples by correlating a pseudo-random noise (PRN) code with the second RF signal and coherent-integrating the correlation result by using the SA data; and
calculating a position solution of the mobile terminal by using the integrated samples. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification