Patents by Inventor Manu H. R. Rao

Manu H. R. Rao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Interference detection and mitigation in RFID readers and systems
    Patent number: 9792470
    Abstract: One embodiment of the present invention includes a Radio Frequency Identification (RFID) reader configured to detect radio frequency (RF) interference in and/or outside a band of RFID operation. The RFID reader includes a receive channel for receiving incoming RF signals; and hardware for detecting interference in and/or outside a band of RFID operation. A method for mitigating radio frequency (RF) interference in and/or outside a band of RFID operation, according to one embodiment, includes detecting interference in and/or outside a band of RFID operation; and controlling an aspect of operation of the RFID reader for mitigating the detected interference.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: October 17, 2017
    Assignee: ZEST LABS, INC.
    Inventors: Dean Kawaguchi, Edward M. Farrell, Prasad Panchalan, Manu H. R. Rao
  • Dynamic signal detection threshold
    Patent number: 8774710
    Abstract: A method for setting a signal detection threshold according to one embodiment includes determining a measure of a noise floor in a signal derived from a radio frequency signal received by an antenna using a same circuit used to detect a subcarrier signal during transmitting and prior to sending a command to a transponder to respond; and setting a signal detection threshold above the noise floor. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 8, 2014
    Assignee: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Manu H. R. Rao
  • Devices employing fast carrier cancellation and methods thereof
    Patent number: 8760261
    Abstract: In one embodiment, a RFID reader circuit includes a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. In another embodiment, a RFID system includes a plurality of RFID tags; and at least one RFID reader, the at least one RFID reader comprising a RFID reader circuit, the circuit comprising: a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. Other systems, methods, and circuits are described as well.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 24, 2014
    Assignee: Intelleflex Corporation
    Inventors: Prasad Panchalan, Manu H. R. Rao, Edward M. Farrell
  • INTERFERENCE DETECTION AND MITIGATION IN RFID READERS AND SYSTEMS
    Publication number: 20130257598
    Abstract: One embodiment of the present invention includes a Radio Frequency Identification (RFID) reader configured to detect radio frequency (RF) interference in and/or outside a band of RFID operation. The RFID reader includes a receive channel for receiving incoming RF signals; and hardware for detecting interference in and/or outside a band of RFID operation. A method for mitigating radio frequency (RF) interference in and/or outside a band of RFID operation, according to one embodiment, includes detecting interference in and/or outside a band of RFID operation; and controlling an aspect of operation of the RFID reader for mitigating the detected interference.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 3, 2013
    Applicant: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Edward M. Farrell, Prasad Panchalan, Manu H. R. Rao
  • DYNAMIC SIGNAL DETECTION THRESHOLD
    Publication number: 20120003938
    Abstract: A method for setting a signal detection threshold according to one embodiment includes determining a measure of a noise floor in a signal derived from a radio frequency signal received by an antenna using a same circuit used to detect a subcarrier signal during transmitting and prior to sending a command to a transponder to respond; and setting a signal detection threshold above the noise floor. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Application
    Filed: June 21, 2011
    Publication date: January 5, 2012
    Applicant: INTELLEFLEX CORPORATION
    Inventors: Dean Kawaguchi, Manu H. R. Rao
  • DEVICES EMPLOYING FAST CARRIER CANCELLATION AND METHODS THEREOF
    Publication number: 20110304439
    Abstract: In one embodiment, a RFID reader circuit includes a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. In another embodiment, a RFID system includes a plurality of RFID tags; and at least one RFID reader, the at least one RFID reader comprising a RFID reader circuit, the circuit comprising: a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. Other systems, methods, and circuits are described as well.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 15, 2011
    Inventors: Prasad Panchalan, Manu H. R. Rao, Edward M. Farrell