System and method of implementing variable loop gain in an optical wireless link based on distance
First Claim
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1. A method of varying loop gain in an optical wireless link, the method comprising the steps of:
- calibrating the optical wireless link to generate a default loop gain, KnomDist, for a first operating distance between a transmitting station and a receiving station;
determining a real operating distance between the transmitting station and the receiving station; and
calibrating the optical wireless link to generate an optimized loop gain, Kdist, as a function of the default loop gain, the first operating distance, and the real operating distance wherein the optimized loop gain, Kdist, is generated according to the relationship Kdist=KNomDist*NomDist/Distance, where KnomDist is the default loop gain for the first operating distance between the transmitting station and the receiving station, NomDist is the first operating distance between the transmitting station and the receiving station, and Distance is the real operating distance between the transmitting station and the receiving station.
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Abstract
A system and method of varying the control loop gain of an optical wireless communication link between a transmitting station and a receiving station as an inverse function of distance between the transmitting station and the receiving station to allow the optical wireless communication link to be used reliably over a wide range of distances.
13 Citations
15 Claims
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1. A method of varying loop gain in an optical wireless link, the method comprising the steps of:
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calibrating the optical wireless link to generate a default loop gain, KnomDist, for a first operating distance between a transmitting station and a receiving station; determining a real operating distance between the transmitting station and the receiving station; and calibrating the optical wireless link to generate an optimized loop gain, Kdist, as a function of the default loop gain, the first operating distance, and the real operating distance wherein the optimized loop gain, Kdist, is generated according to the relationship Kdist=KNomDist*NomDist/Distance, where KnomDist is the default loop gain for the first operating distance between the transmitting station and the receiving station, NomDist is the first operating distance between the transmitting station and the receiving station, and Distance is the real operating distance between the transmitting station and the receiving station. - View Dependent Claims (2, 3, 4)
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5. A method of controlling loop gain in an optical wireless link formed between a transmitting station and a receiving station, the method comprising the steps of:
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calibrating the optical wireless link to generate a nominal loop gain associated with a nominal operating distance between the transmitting station and the receiving station; determining a real operating distance between the transmitting station and the receiving station; calibrating the optical wireless link to generate an optimized loop gain as a function of the nominal loop gain, the nominal operating distance, and the real operating distance; and causing rotation associated with a mirror rotation motor to vary in response to changes in the optimized loop gain caused by changes in the real operating distance between the transmitting station and the receiving station wherein the optimized loop gain is generated according to the relationship Kdist=KNomDist*NomDist/Distance where Kdist is the optimized loop gain, KnomDist is the nominal loop gain associated with the nominal operating distance between the transmitting station and the receiving station, NomDist is the nominal operating distance between the transmitting station and the receiving station, and Distance is the real operating distance between the transmitting station and the receiving station. - View Dependent Claims (6, 7)
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8. A system for controlling loop gain in an optical wireless link formed between an optical transmitting station and an optical receiving station comprising:
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a mirror rotation motor; at least one position sensor operational to sense rotation caused by the mirror rotation motor and generate position data thereof; a data processing device in communication with the mirror rotation motor and the at least one position sensor; and an algorithmic software directing the data processing device, wherein the position data is supplied to the data processing device such that the data processing device, directed by the algorithmic software, is operational to generate optimized loop gain data as in inverse function of distance between the transmitting station and the receiving station, and further wherein the mirror rotation motor is operational to rotate a mirror in response to the optimized loop gain data wherein the algorithmic software is implemented according to the relationship Kdist=KNomDist*NomDist/Distance, where Kdist is the optimized loop gain, KnomDist is a nominal loop gain associated with a nominal operating distance between the transmitting station and the receiving station, NomDist is a nominal operating distance between the transmitting station and the receiving station, and Distance is the real operatinci distance between the transmitting station and the receiving station. - View Dependent Claims (9)
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10. A system for controlling loop gain in an optical wireless link formed between an optical transmitting station and an optical receiving station comprising:
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rotating means for rotating a mirror; sensing means for sensing rotation caused by the rotating means to generate position data thereof; data processing means in communication with the rotating means and the sensing means for processing the position data; and an algorithmic software directing the data processing means, wherein the position data is supplied to the data processing means such that the data processing means, directed by the algorithmic software, is operational to generate optimized loop gain data as in inverse function of distance between the transmitting station and the receiving station, and further wherein the rotating means is operational to rotate a mirror in response to the optimized loop gain data wherein the algorithmic software is defined according to the relationship Kdist=KNomDist*NomDist/Distance, where Kdist is an optimized loop gain, KnomDist is a nominal loop gain associated with a nominal operating distance between the transmitting station and the receiving station, NomDist is a nominal operating distance between the transmitting station and the receiving station, and distance is the real operating distance between the transmitting station and the receiving station. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification