Novas hybrid positioning technology using terrestrial digital broadcasting signal (DBS) and global positioning system (GPS) satellite signal
First Claim
1. A receiver for receiving wireless signals from transmitters to calculate location information, comprising:
- a first tuner for converting a global positioning system (GPS )signal from an original frequency to a first intermediate frequency (IF), the GPS signal having a signal strength;
a second tuner for converting a digital broadcasting system (DBS) signal to a second intermediate frequency (IF), the DBS signal having a signal strength;
a signal detecting unit for detecting the presence of the GPS signal and the DBS signal, measuring the signal strength of a detected signal and outputting a signal indicating an positioning mode based on a measured signal strength;
a hybrid signal processing unit in communication with the first tuner, the second tuner, and the signal detector, the hybrid signal processing unit capable of choosing an positioning mode among a plurality of positioning modes and determining a position of the transmitters and an arrival time difference between each detected signal received at the receiver;
a measurement data processing unit coupled to the hybrid signal processing unit for determining the location information of the receiver based on the position of the transmitters and the arrival time difference.
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Abstract
A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal. The method includes detecting a presence status of the GPS signal through a signal detector in a receiver, detecting a presence status of the DBS signal through the signal detector, determining the signal strength of the GPS signal if the GPS signal is detected, determining the signal strength of the DBS signal if the DBS signal is detected, choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal, and determining a location of the receiver based on the chosen positioning mode. The plurality of positioning modes includes stand-alone GPS mode, assisted GPS (AGPS) mode, assisted GPS positioning with DBS assist mode, DBS positioning with GPS assist mode, stand-alone DBS mode, and assist DBS mode.
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Citations
26 Claims
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1. A receiver for receiving wireless signals from transmitters to calculate location information, comprising:
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a first tuner for converting a global positioning system (GPS )signal from an original frequency to a first intermediate frequency (IF), the GPS signal having a signal strength;
a second tuner for converting a digital broadcasting system (DBS) signal to a second intermediate frequency (IF), the DBS signal having a signal strength;
a signal detecting unit for detecting the presence of the GPS signal and the DBS signal, measuring the signal strength of a detected signal and outputting a signal indicating an positioning mode based on a measured signal strength;
a hybrid signal processing unit in communication with the first tuner, the second tuner, and the signal detector, the hybrid signal processing unit capable of choosing an positioning mode among a plurality of positioning modes and determining a position of the transmitters and an arrival time difference between each detected signal received at the receiver;
a measurement data processing unit coupled to the hybrid signal processing unit for determining the location information of the receiver based on the position of the transmitters and the arrival time difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A positioning method using global positioning system (GPS) signal and digital broadcasting system (DBS) signal, wherein GPS signal having a signal strength and DBS signal also having a signal strength, comprising:
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detecting a presence status of the GPS signal through a signal detector in a receiver;
detecting a presence status of the DBS signal through the signal detector;
determining the signal strength of the GPS signal if the GPS signal is detected;
determining the signal strength of the DBS signal if the DBS signal is detected;
choosing one positioning mode among a plurality of positioning modes in a signal processing unit in the receiver based on signal presence status and the signal strength of a detected signal; and
determining a location of the receiver based on the chosen positioning mode. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification