Systems and methods providing transmit diversity to combat multipath effects in position estimation
First Claim
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1. A method for estimating a position of a receiver using signals transmitted from co-located transmitters, wherein the method comprises:
- transmitting a first signal from a first transmitter located at a first location;
transmitting a second signal from a second transmitter located at a second location, wherein the first signal and the second signal are concurrently transmitted, and wherein the first transmitter and the second transmitter are co-located transmitters that are located within a threshold distance from each other; and
determining if the first signal arrived at the receiver before or after the second signal arrived at the receiver,wherein;
if the first signal is determined to have arrived at the receiver before the second signal arrived at the receiver, the method comprises;
determining an estimated position of the receiver (a) using information extracted from the first signal and using information extracted from the second signal that has been adjusted, or (b) using information extracted from the first signal and without using information extracted from the second signal;
orif the second signal is determined to have arrived at the receiver before the first signal arrived at the receiver, the method comprises;
determining the estimated position of the receiver (a) using information extracted from the second signal and using information extracted from the first signal that has been adjusted, or (b) using information extracted from the second signal and without using information extracted from the first signal.
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Abstract
Systems and methods for estimating a position of receiver using sets of two or more transmitters that share one or more common characteristics with each other. The systems and methods may estimate the position of the receiver using signals that were transmitted from a different transmitter in a set of co-located transmitters.
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Citations
37 Claims
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1. A method for estimating a position of a receiver using signals transmitted from co-located transmitters, wherein the method comprises:
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transmitting a first signal from a first transmitter located at a first location; transmitting a second signal from a second transmitter located at a second location, wherein the first signal and the second signal are concurrently transmitted, and wherein the first transmitter and the second transmitter are co-located transmitters that are located within a threshold distance from each other; and determining if the first signal arrived at the receiver before or after the second signal arrived at the receiver, wherein; if the first signal is determined to have arrived at the receiver before the second signal arrived at the receiver, the method comprises;
determining an estimated position of the receiver (a) using information extracted from the first signal and using information extracted from the second signal that has been adjusted, or (b) using information extracted from the first signal and without using information extracted from the second signal;
orif the second signal is determined to have arrived at the receiver before the first signal arrived at the receiver, the method comprises;
determining the estimated position of the receiver (a) using information extracted from the second signal and using information extracted from the first signal that has been adjusted, or (b) using information extracted from the second signal and without using information extracted from the first signal. - 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, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A system for estimating a position of receiver, the system comprising:
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a first transmitter located at a first location; a second transmitter located at a second location, wherein the first transmitter and the second transmitter are co-located transmitters that are located within a threshold distance from each other, and wherein a processor of the system is operable to; determine if a first signal transmitted by the first transmitter arrived at the receiver before or after a second signal transmitted by the second transmitter arrived at the receiver, wherein the first signal and the second signal were concurrently transmitted; determine, if the first signal is determined to have arrived at the receiver before the second signal arrived at the receiver, an estimated position of the receiver (a) using information extracted from the first signal and using information extracted from the second signal that has been adjusted, or (b) using information extracted from the first signal and without using information extracted from the second signal;
ordetermine, if the second signal is determined to have arrived at the receiver before the first signal arrived at the receiver, the estimated position of the receiver (a) using information extracted from the second signal and using information extracted from the first signal that has been adjusted, or (b) using information extracted from the second signal and without using information extracted from the first signal.
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Specification