Patents by Inventor Subramanian Anantharaman Chandrasekarapuram

Subramanian Anantharaman Chandrasekarapuram 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).

  • Publication number: 20230318656
    Abstract: According to an aspect of an embodiment, a base station configured for enhanced receiver sensitivity may comprise a processing device and a receiver. The receiver (Rx) may be configured to receive an Rx output signal in an Rx band. The processing device may be configured to receive the Rx output signal from the receiver on an Rx path and receive a crest factor reduction (CFR) output signal from a CFR on a transmit (Tx) path. The processing device may be configured to calibrate the CFR output signal based on the Rx output signal to generate a non-linear actuation (NA) input signal and generate an intermodulation distortion signal by using an NA function on the NA input signal.
    Type: Application
    Filed: April 3, 2023
    Publication date: October 5, 2023
    Inventors: Zohaib Mahmood, Subramanian Anantharaman Chandrasekarapuram, Srivathsa Acharya, Gopala Krishna Murthy Vemula, Devika Sunilkumar
  • Publication number: 20230318648
    Abstract: A system includes a receiver (RX) configured to receive an RX output signal in an RX band, where the RX output signal has a first passive intermodulation (PIM) source in the RX band and a second PIM source in the RX band; and a processing device configured to: receive the RX output signal from the receiver on an RX path, receive a crest factor reduction (CFR) output signal from a CFR on a transmit (TX) path, identify the first PIM source and the second PIM source based on the RX output signal and the CFR output signal, calibrate the CFR output signal based on the first and second PIM sources in the RX output signal to generate a non-linear actuation (NA) input signal, and generate an intermodulation distortion signal by using an NA function on the NA input signal.
    Type: Application
    Filed: April 3, 2023
    Publication date: October 5, 2023
    Inventors: Zohaib Mahmood, Subramanian Anantharaman Chandrasekarapuram, Srivathsa Acharya, Gopala Krishna Murthy Vemula, Devika Sunilkumar
  • Publication number: 20220407567
    Abstract: A system for a radio access network (RAN) includes a radio unit (RU) configured to receive first in-phase and quadrature (I/Q) data represented in a first domain from a distributed unit (DU). The system includes a beamformer associated with the RU. The beamformer is configured to receive the first I/Q data represented in the first domain. The beamformer is also configured to transmit second I/Q data represented in the first domain based on the first I/Q data in the first domain. The system also includes a transceiver associated with the RU. The transceiver is configured to receive the second I/Q data represented in the first domain. The transceiver is also configured to convert the second I/Q data represented in the first domain to second I/Q data represented in a second domain.
    Type: Application
    Filed: June 19, 2022
    Publication date: December 22, 2022
    Inventors: Sameer Madhav GANDHI, Praveen Ghanashyam SHEKOKAR, Subramanian Anantharaman CHANDRASEKARAPURAM, Prasenjit BHOWMIK
  • Publication number: 20190068227
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: October 26, 2018
    Publication date: February 28, 2019
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 10187096
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 22, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Publication number: 20170264325
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 14, 2017
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 9685983
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: June 20, 2017
    Assignee: Maxlinear, Inc.
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Publication number: 20160127119
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: December 21, 2015
    Publication date: May 5, 2016
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi