Apparatus and method for compensation of AM noise in RFID devices through modulation of a received signal
First Claim
Patent Images
1. A method for compensation of noise in a Radio Frequency Identification (RFID) device through modulation of a received signal, the method comprising:
- determining an amplitude signal proportional to an amplitude of a transmitter signal and associated noise;
processing the amplitude signal to derive a correction signal through a programmable stage that amplifies the amplitude signal and creates the correction signal; and
modulating a received signal during a receive period with the correction signal to substantially remove the associated noise from the received signal.
6 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for compensation of noise in a Radio Frequency Identification (RFID) device through modulation of a received signal is described. The method includes determining an amplitude signal proportional to an amplitude of a transmitter signal and associated noise; processing the amplitude signal to derive a correction signal; and modulating a received signal during a receive period with the correction signal to substantially remove the associated noise from the received signal. An RFID device and an RFID transceiver integrated circuit (IC) are also described.
-
Citations
18 Claims
-
1. A method for compensation of noise in a Radio Frequency Identification (RFID) device through modulation of a received signal, the method comprising:
-
determining an amplitude signal proportional to an amplitude of a transmitter signal and associated noise; processing the amplitude signal to derive a correction signal through a programmable stage that amplifies the amplitude signal and creates the correction signal; and modulating a received signal during a receive period with the correction signal to substantially remove the associated noise from the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A Radio Frequency Identification (RFID) device, the RFID device comprising:
-
a transmitter; a receiver; a coupling device coupling the transmitter and the receiver to an antenna; a noise compensation function comprising circuitry configured to; determine an amplitude signal proportional to an amplitude of a transmitter signal and associated noise from the transmitter; process the amplitude signal to derive a correction signal through a programmable stage that amplifies the amplitude signal and creates the correction signal; and modulate a received signal during a receive period from the receiver with the correction signal to substantially remove the associated noise from the received signal. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A Radio Frequency Identification (RFID) transceiver integrated circuit, the RFID transceiver integrated circuit comprising:
-
a transmitter; a receiver, wherein each of the transmitter and the receiver are configured to utilize a same antenna; a noise compensation function comprising circuitry configured to; determine an amplitude signal proportional to an amplitude of a transmitter signal and associated noise from the transmitter; process the amplitude signal to derive a correction signal through a programmable stage that amplifies the amplitude signal and creates the correction signal; and modulate a received signal during a receive period from the receiver with the correction signal to substantially remove the associated noise from the received signal.
-
Specification