Methods and systems for determining the position of a mobile terminal using digital television signals
First Claim
1. A method for determining the position of a mobile terminal comprising:
- estimating the position of the mobile terminal based on range estimates derived from digital television signals received at the mobile terminal from at least one digital television transmitter and based on range estimates derived from signals received at the mobile terminal from at least one other type of transmitter.
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Accused Products
Abstract
Methods, circuits and mobile terminals determine the position of the mobile terminal. The position of the mobile terminal is estimated based on range estimates derived from digital television signals received at the mobile terminal from at least one digital television transmitter and based on range estimates derived from signals received at the mobile terminal from at least one other type of transmitter. For example, the other type of transmitter may be a GPS satellite or a base station of a mobile telecommunications network. Accordingly, by combining ranging signals from multiple sources, flexibility in acquiring enough signals to estimate a position of the mobile terminal may be increased and the estimation of the position may not require the use of weak digital television signals.
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Citations
49 Claims
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1. A method for determining the position of a mobile terminal comprising:
estimating the position of the mobile terminal based on range estimates derived from digital television signals received at the mobile terminal from at least one digital television transmitter and based on range estimates derived from signals received at the mobile terminal from at least one other type of transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for determining the position of a mobile terminal comprising:
estimating the position of the mobile terminal based on range estimates derived from digital television signals received at the mobile terminal from at least one digital television transmitter and based on range estimates derived from signals transmitted by the mobile terminal to at least one base station of a mobile telecommunications network. - View Dependent Claims (24, 25)
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26. A position determination circuit for a mobile terminal comprising:
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a television signal processing circuit configured to process digital television signals received from digital television transmitters;
a second type of signal processing circuit configured to process ranging signals received from an alternate type of transmitter different from the digital television transmitters; and
a position computation circuit that estimates a position of the mobile terminal based on a range estimate to at least one of the digital television transmitters derived from a digital television signal received from the at least one of the digital television transmitters and based on a range estimate to at least one transmitter of the alternate type of transmitter derived from a received ranging signal from the at least one transmitter of the alternate type of transmitter.
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27. A position determination circuit for a mobile terminal comprising:
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a television signal processing circuit configured to process digital television signals received from digital television transmitters;
a second type of signal processing circuit configured to process ranging signals received from a base station of a mobile telecommunications network; and
a position computation circuit that estimates a position of the mobile terminal based on a range estimate to at least one of the digital television transmitters derived from a digital television signal received from the at least one of the digital television transmitters and based on a range estimate to the base station of a mobile telecommunications network transmitter derived from signals transmitted by the mobile terminal to the base station of a mobile telecommunications network.
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28. A mobile terminal comprising:
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a receiver configured to receive digital television signals from digital television transmitters and to receive ranging signals from an alternate type of transmitter different from the digital television transmitters;
a television signal processing circuit configured to process the received digital television signals;
a second type of signal processing circuit configured to process the ranging signals received from an alternate type of transmitter different from the digital television transmitters; and
a position computation circuit that estimates a position of the mobile terminal based on a range estimate to at least one of the digital television transmitters derived from a digital television signal received from the at least one of the digital television transmitters and based on a range estimate to at least one transmitter of the alternate type of transmitter derived from a received ranging signal from the at least one transmitter of the alternate type of transmitter. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method for determining the position of a mobile terminal comprising:
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receiving digital television signals from a source digital television transmitter at the mobile terminal, the digital television signals including an identification of at least one other ranging information transmitter in a vicinity of the mobile terminal and a timing relation between a timing of the source digital television transmitter and a timing of the at least one other ranging information transmitter;
receiving ranging signals from the at least one other ranging information transmitter based on the received timing relation; and
estimating the position of the mobile terminal based on range estimates derived from the digital television signals received at the mobile terminal from the source digital television transmitter and from the ranging signals received from the at least one other ranging information transmitter. - View Dependent Claims (43, 44, 45, 46)
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47. A position determination circuit for a mobile terminal comprising:
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a receiver that receives digital television signals from a source digital television transmitter at the mobile terminal, the digital television signals including an identification of at least one other ranging information transmitter in a vicinity of the mobile terminal and a timing relation between a timing of the source digital television transmitter and a timing of the at least one other ranging information transmitter;
a receiver that receives ranging signals from the at least one other ranging information transmitter based on the received timing relation; and
a position computation circuit that estimates a position of the mobile terminal based on range estimates derived from the digital television signals received at the mobile terminal from the source digital television transmitter and from the ranging signals received from the at least one other ranging information transmitter. - View Dependent Claims (48, 49)
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Specification