Gain adjustment method in two-way communication systems
First Claim
1. A method of reducing the dynamic range reception requirements of an RF identification tag transceiver in RF communication with a local transceiver, the RF identification tag transceiver being smaller and lighter than the local transceiver, comprising the steps of:
- A. the local transceiver transmitting to the RF identification tag a first RF signal having a minimum power level;
B. the local transceiver waiting to receive a response RF signal from the identification tag; and
C. subsequently, if the transceiver fails to receive a response during the waiting step, repeating steps A and B using successively higher powers to transmit the first RF signal in each successive repetition of step A;
D. whereby the local transceiver avoids sending unnecessarily powerful signals to the RF identification tag transceiver, thereby reducing the dynamic range of RF signals which the RF identification tag transceiver must be capable of receiving.
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Accused Products
Abstract
A method for minimizing the power used by a remote transceiver in 2-way communication between local and remote transceivers. By repeatedly transmitting a signal with successively increasing power from one transceiver until a response is received from the other transceiver, the dynamic range and hence complexity of the receiving circuit may be greatly reduced. The operating power of the remote transmitter can then be adjusted according to the level used by the local transmitter, thereby promoting the efficent use of the remote'"'"'s power supply.
124 Citations
3 Claims
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1. A method of reducing the dynamic range reception requirements of an RF identification tag transceiver in RF communication with a local transceiver, the RF identification tag transceiver being smaller and lighter than the local transceiver, comprising the steps of:
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A. the local transceiver transmitting to the RF identification tag a first RF signal having a minimum power level; B. the local transceiver waiting to receive a response RF signal from the identification tag; and C. subsequently, if the transceiver fails to receive a response during the waiting step, repeating steps A and B using successively higher powers to transmit the first RF signal in each successive repetition of step A; D. whereby the local transceiver avoids sending unnecessarily powerful signals to the RF identification tag transceiver, thereby reducing the dynamic range of RF signals which the RF identification tag transceiver must be capable of receiving. - View Dependent Claims (2, 3)
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Specification