Radio frequency device for receiving TV signals and GPS satellite signals and performing positioning
First Claim
1. A receiver for processing television signals and GPS signals for position determination comprising:
- an antenna system for receiving a plurality of signals, at least one television signal and at least one GPS signal, wherein the at least one television signal operates at a first frequency and the at least one GPS signal operates at a second frequency;
a receiver front end coupled to the antenna system for converting the plurality of signals from at least one of the first frequency or of the second frequency to a third frequency; and
a processing component coupled to the receiver front end for accepting the plurality of signals operating at the third frequency and for converting the plurality of signals into position information of the receiver.
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Accused Products
Abstract
An apparatus and method for determining the position of a user terminal comprise an antenna subsystem which is able to receive signals of GPS and TV, a receiver front end which converts the frequency of the incident signals and filters out unwanted signals so that the desired signals can be sampled, a digital processing component which accommodates the imperfections of the front end and converts the measured signals into a position information. The apparatus is capable of receiving at the user terminal, broadcast television signals from television signal transmitters; determining a first set of pseudo-ranges between the user terminal and the television signal transmitters based on a known component of the broadcast television signals; receiving at the user terminal global positioning signals from a global positioning satellites; determining a second set of pseudo-ranges between the user terminal and the global positioning satellites based on the global positioning signals; and determining a position of the user terminal based on the first and second sets of pseudo-ranges, locations of the television signal transmitters, and locations of the global positioning satellites.
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Citations
50 Claims
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1. A receiver for processing television signals and GPS signals for position determination comprising:
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an antenna system for receiving a plurality of signals, at least one television signal and at least one GPS signal, wherein the at least one television signal operates at a first frequency and the at least one GPS signal operates at a second frequency;
a receiver front end coupled to the antenna system for converting the plurality of signals from at least one of the first frequency or of the second frequency to a third frequency; and
a processing component coupled to the receiver front end for accepting the plurality of signals operating at the third frequency and for converting the plurality of signals into position information of the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A receiver for processing television signals and GPS signals for position determination comprising:
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a first antenna for receiving at least one first signal at a first frequency;
a first low noise amplifier for amplifying the at least one first signal;
a second antenna for receiving at least one second signal at a second frequency;
a second low noise amplifier for amplifying the at least one second signal;
a first frequency converter having a first frequency converter input and a first frequency converter output, the first frequency converter input coupled to the first low noise amplifier for performing frequency conversion on the at least one first signal;
a switch having a first switch input, a second switch input and a switch output, the first switch input coupled to the first frequency converter output, the second switch input coupled to the second low noise amplifier, the switch for selecting between the at least one first signal or the at least one second signal;
a bandpass filter coupled to the switch output for filtering the at least one first signal or the at least one second signal;
a second frequency converter coupled to the bandpass filter for converting the at least one first signal or the at least one second signal to a post-frequency converter signal at a third frequency;
an analog-to-digital converter coupled to the second frequency converter for digitizing the post-converter signal and generating a digitized signal; and
a processor coupled to the analog-to-digital converter for accepting the digitized signal and for converting the digitized signal into a position information. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A receiver for processing television signals and GPS signals for position determination comprising:
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an antenna system for receiving a plurality of signals selected from the group comprising at least one television signal and at least one GPS signal, wherein the at least one television signal operates at a first frequency and the at least one GPS signal operates at a second frequency;
a low noise amplifier coupled to the antenna system for amplifying the plurality of signals;
an I/Q downconverter coupled to the low noise amplifier for downconverting the plurality of signals to a third frequency and for generating an I component and a Q component for each of the plurality of signals;
a first low pass filter coupled to the I/Q downconverter for filtering the I component;
a second low pass filter coupled to the I/Q downconverter for filtering the Q component;
a first analog-to-digital converter coupled to the first low pass filter for digitizing the I component and generating a digitized I component;
a second analog-to-digital converter coupled to the second low pass filter for digitizing the Q component and generating a digitized Q component;
a processing component having a first processing input and a second processing input, the first processing input coupled to the first analog-to-digital converter for accepting the digitized I component, the second processing input coupled to the second analog-to-digital converter for accepting the digitized Q component. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A receiver for processing television signals and GPS signals for position determination comprising:
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an antenna system for receiving a plurality of signals selected from the group comprising at least one television signal and at least one GPS signal, wherein the at least one television signal operates at a first frequency and the at least one GPS signal operates at a second frequency;
a tunable bandpass filter having an adjustable passband, the tunable bandpass filter coupled to the antenna system for receiving the plurality of signals;
a low noise amplifier coupled to the tunable bandpass filter for amplifying the plurality of signals;
an I/Q downconverter coupled to the low noise amplifier for downconverting the plurality of signals to a third frequency and for generating an I component and a Q component for each of the plurality of signals, wherein the I/Q downconverter comprises a first mixer coupled to a local oscillator, and a 90 degree phase shifter having a shifter input and a shifter output, the shifter input coupled to the local oscillator and the shifter output coupled to a second mixer;
a first low pass filter coupled to the I/Q downconverter for filtering the I component;
a second low pass filter coupled to the I/Q downconverter for filtering the Q component;
a first analog-to-digital converter coupled to the first low pass filter for digitizing the I component and generating a digitized I component;
a second analog-to-digital converter coupled to the second low pass filter for digitizing the Q component and generating a digitized Q component;
a processing component having a first processing input and a second processing input, the first processing input coupled to the first analog-to-digital converter for accepting the digitized I component, the second processing input coupled to the second analog-to-digital converter for accepting the digitized Q component, wherein the processing component converts the digitized I component and the digitized Q component into a position information.
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Specification