System and Method for Determining Vehicle Position Based Upon Light-Based Communication Using Signal-to-Noise Ratio or Received Signal Strength Indicator
First Claim
1. A first light based communication (LBC) system for determining vehicle position, the system comprising:
- a transmitter array of light emitting diodes (LEDs);
a receiver array of photodiodes; and
a controller coupled to the transmitter array of LEDS and to the receiver array of photodiodes, the controller includinga processor configured to determine a relative distance between a first vehicle and a second vehicle based on a first signal parameter of a first digital message received at the receiver array of photodiodes.
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Accused Products
Abstract
A system and method for determining vehicle position uses light based communication (LBC) signals and a received signal strength indicator (RSSI) to determine the vehicle position. Each vehicle includes a LBC system having an array of transmitting light emitting diodes (LEDs) and an array of receiver photodiodes for transmitting and receiving pulsed light binary messages. Each LBC system has a controller coupled to the transmitter diodes and receiver diodes. The controller includes a vehicle communication module that may be executed by a processor to determine the distance. The processor models a first distance between a first transmitting LBC system and a first receiving LBC system, then models a second distance between a second transmitting LBC system and the first receiving LBC system, and then determines the distance between the first vehicle and the second vehicle using trilateration of the first distance and the second distance.
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Citations
19 Claims
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1. A first light based communication (LBC) system for determining vehicle position, the system comprising:
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a transmitter array of light emitting diodes (LEDs); a receiver array of photodiodes; and a controller coupled to the transmitter array of LEDS and to the receiver array of photodiodes, the controller including a processor configured to determine a relative distance between a first vehicle and a second vehicle based on a first signal parameter of a first digital message received at the receiver array of photodiodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining vehicle position based upon light based communication (LBC), the method comprising:
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receiving, at a receiver array of photodiodes in a first LBC system of a first vehicle, a first digital message, the first digital message being received from a second LBC system of a second vehicle; measuring, by a processor coupled to the receiver array of photodiodes, a first signal parameter of the first digital message; and using trilateration to determine a relative distance between the first vehicle and the second vehicle based at least in part on the first signal parameter of the first digital message. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A computer program product comprising one or more non-transitory processor-readable mediums encoded with instructions that when executed by one or more processors cause a process to be carried out for determining vehicle position using light based communication (LBC), the process comprising:
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measuring a first signal parameter of a first digital message received by a receiver array of photodiodes in a first LBC system of a first vehicle and received from a second LBC system of a second vehicle; and using trilateration to determine a relative distance between the first vehicle and the second vehicle based on the first signal parameter. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification