Method of communications in a backscatter system, interrogator, and backscatter communications system
First Claim
Patent Images
1. A method of communications in a backscatter system, the method comprising:
- transmitting a command at a first power level; and
transmitting a continuous wave for a backscatter reply, the continuous wave being transmitted at a second power level different from the first power level.
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Abstract
A method of communications in a backscatter system, the method comprising transmitting a command at a first power level; and transmitting a continuous wave for a backscatter reply, the continuous wave being transmitted at a second power level different from the first power level. An interrogator for use in a backscatter system, the interrogator comprising a transmitter configured to transmit a command at a first power level and to transmit a continuous wave for a backscatter reply, the transmitter being configured to transmit the continuous wave at a second power level different from the first power level.
120 Citations
43 Claims
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1. A method of communications in a backscatter system, the method comprising:
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transmitting a command at a first power level; and
transmitting a continuous wave for a backscatter reply, the continuous wave being transmitted at a second power level different from the first power level. - View Dependent Claims (2, 3)
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4. A method of communications in a backscatter system including an interrogator and a wireless communications device, the method comprising:
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transmitting a command from the interrogator to the wireless communications device at a first power level; and
transmitting a continuous wave from the interrogator to the wireless communications device for a backscatter reply, the continuous wave being transmitted at a second power level higher than the first power level. - View Dependent Claims (5, 6)
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7. A method of communications in a backscatter system including an interrogator and a wireless communications device, the method comprising:
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transmitting a command from the interrogator to the wireless communications device at a first power level; and
transmitting a continuous wave from the interrogator to the wireless communications device for a backscatter reply, the continuous wave being transmitted at a second power level higher than the first power level, wherein the chances are increased that the wireless communications device will receive the continuous wave and the interrogator will receive a reply from the wireless communication device if the wireless communications device received the command. - View Dependent Claims (8, 9)
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10. A method of communications in a backscatter system including an interrogator and a wireless communications device having an integrated circuit having a processor, and a memory, a receiver, and a backscatter modulator coupled to the processor, the method comprising:
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transmitting a command to the wireless communications device from the interrogator at a first power level; and
transmitting a continuous wave to the wireless communications device from the interrogator for modulation by the backscatter modulator at a second power level, after the transmitting, wherein the first power level and second power level are independently controllable. - View Dependent Claims (11, 12, 13, 14)
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15. A method of communications in a backscatter system including an interrogator and including a wireless communications device having an integrated circuit having a processor, and a memory, a receiver, and a backscatter modulator coupled to the processor, the method comprising:
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transmitting a command from the interrogator to the wireless communications device at a first power level; and
transmitting a continuous wave from the interrogator to the wireless communications device for modulation by the backscatter modulator at a second power level, wherein transmitting the command and transmitting the continuous wave comprises independently controlling the first power level and second power level. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A backscatter system interrogator, the interrogator comprising:
a transmitter configured to transmit a command at a first power level and to transmit a continuous wave for a backscatter reply, the transmitter being configured to transmit the continuous wave at a second power level different from the first power level. - View Dependent Claims (24, 25)
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26. A backscatter communications system comprising:
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a wireless communications device; and
an interrogator configured to transmit a command to the wireless communications device at a first power level and subsequently transmit a continuous wave to the wireless communications device for a backscatter reply, the interrogator being configured to transmit the continuous wave at a second power level higher than the first power level. - View Dependent Claims (27, 28)
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29. A backscatter communications system comprising:
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a wireless communications device; and
an interrogator configured to transmit a command to the wireless communications device at a first power level and subsequently transmit a continuous wave to the wireless communications device for a backscatter reply, the interrogator being configured to transmit the continuous wave at a second power level higher than the first power level, wherein the likelihood that the wireless communications device is capable of a reply, if the wireless communications device received the command, is increased. - View Dependent Claims (30)
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31. A system comprising:
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a wireless communications device including an integrated circuit having a processor, and a memory, a receiver, and a backscatter modulator coupled to the processor; and
an interrogator configured to transmit a command to the wireless communications device at a first power level and subsequently transmit a continuous wave to the wireless communications device for modulation by the backscatter modulator at a second power level, the first power level and second power level being independently controllable. - View Dependent Claims (32, 33, 34)
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35. A system comprising:
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a wireless communications device including an integrated circuit having a processor, and a memory, a receiver, and a backscatter modulator coupled to the processor; and
an interrogator configured to transmit a command to the wireless communications device at a first power level and subsequently transmit a continuous wave to the wireless communications device for modulation by the backscatter modulator at a second power level, the first power level and second power level being independently controllable, the interrogator including a controllable attenuator configured to control at least one of the first and second power levels. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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Specification