METHOD AND APPARATUS FOR TRANSMITTING A SIGNAL BY A RADIO FREQUENCY IDENTIFICATION READER
First Claim
1. A method for transmitting a signal by a Radio Frequency Identification (RFID) reader, the method comprising:
- receiving a digital input signal;
converting the digital input signal to an analog input signal;
determining whether the digital input signal is an unmodulated signal or is modulated with information;
when the digital input signal is modulated with information, filtering the analog input signal to produce a filtered signal and transmitting the filtered signal; and
when the digital input signal is an unmodulated signal, bypassing the filtering of the analog input signal to produce an unfiltered analog input signal and transmitting the unfiltered analog input signal.
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Accused Products
Abstract
A Radio Frequency Identification (RFID) reader is provided that receives a digital input signal, converts the digital input signal to an analog input signal, and determines whether the digital input signal is an unmodulated signal or is modulated with information. When the digital input signal is modulated with information, the RFID reader filters the analog input signal to produce a filtered analog input signal and transmits the filtered signal. When the digital input signal is an unmodulated signal, the RFID reader bypasses the filtering of the analog input signal to produce an unfiltered analog input signal and transmits the unfiltered analog input signal.
20 Citations
21 Claims
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1. A method for transmitting a signal by a Radio Frequency Identification (RFID) reader, the method comprising:
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receiving a digital input signal; converting the digital input signal to an analog input signal; determining whether the digital input signal is an unmodulated signal or is modulated with information; when the digital input signal is modulated with information, filtering the analog input signal to produce a filtered signal and transmitting the filtered signal; and when the digital input signal is an unmodulated signal, bypassing the filtering of the analog input signal to produce an unfiltered analog input signal and transmitting the unfiltered analog input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A Radio Frequency Identification (RFID) reader comprising:
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a processor that is configured to produce a digital input signal and to determine whether the digital input signal is an unmodulated signal or is modulated with information; transmitter circuitry that is configured to transmit a wireless signal, wherein the transmitter circuitry is configured to; receive the digital input signal; convert the digital input signal to an analog input signal; when the digital input signal is modulated with information, filter the analog input signal to produce a filtered analog input signal and transmit the filtered signal; and when the digital input signal is an unmodulated signal, bypass the filtering of the analog input signal to produce an unfiltered analog input signal and transmit the unfiltered analog input signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable storage medium having computer readable code stored thereon for programming a processor to perform the steps of:
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providing a digital input signal to transmitter circuitry of a Radio Frequency Identification (RFID) reader; determining whether the digital input signal is an unmodulated signal or is modulated with information; when the digital input signal is modulated with information, control a filtering of an analog version of the digital input signal to produce a filtered analog input signal; and when the digital input signal is an unmodulated signal, control a bypassing of a filtering of the analog version of the digital input signal to produce an unfiltered analog input signal. - View Dependent Claims (21)
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Specification