Methods of processing a wireless communication signal, wireless communication synchronization methods, and a radio frequency identification device communication method
First Claim
1. A method of processing a wireless communication signal comprising:
- providing a radio frequency identification device;
receiving a data signal including a plurality of digital values within the radio frequency identification device;
using the radio frequency identification device, sampling the data signal at a plurality of moments in time during each of the digital values; and
wherein the sampling at one moment in time comprises sampling as a result of a transition in the data signal and the sampling at another moment in time comprises sampling after the elapse of a predetermined period of time without a transition in the data signal.
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Abstract
In one aspect, a wireless communication device includes an antenna configured to receive electromagnetic energy corresponding to a wireless communication signal outputted using an interrogator and to output electrical energy corresponding to the received electromagnetic energy, communication circuitry coupled with the antenna and configured to sample the electrical energy to process the wireless communication signal, synchronization circuitry coupled with the antenna and the communication circuitry and configured to generate a clock signal to control sampling of the electrical energy using the communication circuitry, wherein the synchronization circuitry is configured to generate a plurality of transitions within the clock signal responsive to a plurality of transitions of the electrical energy during a first data period and wherein the synchronization circuitry is configured to generate a plurality of transitions within the clock signal during a second data period including generating at least one of the transitions independent of transitions of the electrical energy.
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Citations
26 Claims
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1. A method of processing a wireless communication signal comprising:
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providing a radio frequency identification device; receiving a data signal including a plurality of digital values within the radio frequency identification device; using the radio frequency identification device, sampling the data signal at a plurality of moments in time during each of the digital values; and wherein the sampling at one moment in time comprises sampling as a result of a transition in the data signal and the sampling at another moment in time comprises sampling after the elapse of a predetermined period of time without a transition in the data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communication synchronization method comprising:
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receiving a data signal; first generating a plurality of edge pulses corresponding to the data signal; second generating a plurality of transitions within a clock signal as a result of a plurality of edge pulses during a first digital value of the data signal; third generating a plurality of transitions within the clock signal during a second digital value of the data signal including generating at least one of the transitions independent of the edge pulses during the second digital value of the data signal; and sampling the data signal using the clock signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A radio frequency identification device communication method comprising:
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receiving a data signal within a radio frequency identification device, and wherein the data signal includes a plurality of transitions corresponding to digital data encoded according to a data encoding format including one of a biphase mark format and a biphase space format; generating a plurality of edge pulses corresponding to the transitions of the data signal; generating a clock signal having a plurality of transitions using an oscillator of the radio frequency identification device; generating the transitions of the clock signal using the edge pulses during a first digital value of the data signal; generating at least one of the transitions of the clock signal using a time constant of the oscillator and independent of the edge pulses during a second digital value of the data signal; sampling the data signal using the clock signal; and backscatter modulating a continuous wave signal after the sampling to formulate a reply communication to the received data signal.
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Specification