Method and apparatus for attenuating of a broadcasting received signal for achieving a better distance resolution in monitoring systems
First Claim
1. A receiving unit associated with at least one local monitoring unit for use in a monitoring system, the receiving unit receiving transmitted signals transmitted from at least one transmitting tag, the receiving unit comprising:
- a receiver for receiving and processing the transmitted signals into readable data;
electronic circuitry for calculating the received strength signal indication;
an attenuating unit for attenuating the received signals by a controlled factor, said controlled factor being determined in accordance with said received signal strength indication; and
a microcontroller for determining the distance between the at least one transmitting tag and the receiving unit.
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Accused Products
Abstract
A receiving unit and method for determining the distance of an object from a receiving unit in a monitoring system, the receiving unit receives transmitted signals, the receiving unit comprises an attenuating unit for attenuating the transmitted signals by a controlled factor; a receiver for receiving and processing the transmitted signals into readable data; a microcontroller for controlling the operation of the local monitoring unit; and an electronic circuitry for calculating the received strength signal indication, whereby the distance of an object from the receiving unit can be determined.
21 Citations
15 Claims
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1. A receiving unit associated with at least one local monitoring unit for use in a monitoring system, the receiving unit receiving transmitted signals transmitted from at least one transmitting tag, the receiving unit comprising:
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a receiver for receiving and processing the transmitted signals into readable data; electronic circuitry for calculating the received strength signal indication; an attenuating unit for attenuating the received signals by a controlled factor, said controlled factor being determined in accordance with said received signal strength indication; and a microcontroller for determining the distance between the at least one transmitting tag and the receiving unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining a distance of at least one transmitting tag from a receiving unit, the method comprising the steps of:
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waiting for a signal to be received from an at least one transmitting tag; passing the received signal to a microcontroller for processing; measuring the received signal and calculating a received signal strength indication of the received signal; if the received signal strength indication is stronger than a threshold level, updating the microcontroller to increase attenuation of a subsequently received signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification