Patents by Inventor Sudarsan Krishnan

Sudarsan Krishnan 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: 20230403089
    Abstract: Various aspects of the present disclosure generally relate to wireless communication and testing. In some aspects, a device may receive information identifying a mount orientation of a wireless communication device, wherein the mount orientation indicates an orientation of a coordinate system of the wireless communication device relative to a coordinate system of a positioner. The device may capture measurement information at each position of a set of positions of the wireless communication device, wherein the set of positions comprises positions of the wireless communication device as the wireless communication device is rotated around an axis by the positioner, and wherein the measurement information is captured based at least in part on the mount orientation. The device may provide information identifying the measurement information. Some techniques and apparatuses described herein may use the measurement information to generate a codebook for beam generation. Numerous other aspects are provided.
    Type: Application
    Filed: August 18, 2023
    Publication date: December 14, 2023
    Inventors: Mingming CAI, Raghu Narayan CHALLA, Revathi SUNDARA RAGHAVAN, Michael BURKE, Abhilash BANGALORE RAVI, Mihir Vijay LAGHATE, Shrenik PATEL, Sang-June PARK, Mohammad Ali TASSOUDJI, Sudarsan KRISHNAN, Vasanthan RAGHAVAN, Siddharth KAMATH
  • Patent number: 11764888
    Abstract: Various aspects of the present disclosure generally relate to wireless communication and testing. In some aspects, a device may receive information identifying a mount orientation of a wireless communication device, wherein the mount orientation indicates an orientation of a coordinate system of the wireless communication device relative to a coordinate system of a positioner. The device may capture measurement information at each position of a set of positions of the wireless communication device, wherein the set of positions comprises positions of the wireless communication device as the wireless communication device is rotated around an axis by the positioner, and wherein the measurement information is captured based at least in part on the mount orientation. The device may provide information identifying the measurement information. Some techniques and apparatuses described herein may use the measurement information to generate a codebook for beam generation. Numerous other aspects are provided.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: September 19, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Mingming Cai, Raghu Narayan Challa, Revathi Sundara Raghavan, Michael Burke, Abhilash Bangalore Ravi, Mihir Vijay Laghate, Shrenik Patel, Sang-June Park, Mohammad Ali Tassoudji, Sudarsan Krishnan, Vasanthan Raghavan, Siddharth Kamath
  • Publication number: 20200389238
    Abstract: Various aspects of the present disclosure generally relate to wireless communication and testing. In some aspects, a device may receive information identifying a mount orientation of a wireless communication device, wherein the mount orientation indicates an orientation of a coordinate system of the wireless communication device relative to a coordinate system of a positioner. The device may capture measurement information at each position of a set of positions of the wireless communication device, wherein the set of positions comprises positions of the wireless communication device as the wireless communication device is rotated around an axis by the positioner, and wherein the measurement information is captured based at least in part on the mount orientation. The device may provide information identifying the measurement information. Some techniques and apparatuses described herein may use the measurement information to generate a codebook for beam generation. Numerous other aspects are provided.
    Type: Application
    Filed: June 4, 2020
    Publication date: December 10, 2020
    Inventors: Mingming CAI, Raghu Narayan CHALLA, Revathi SUNDARA RAGHAVAN, Michael BURKE, Abhilash BANGALORE RAVI, Mihir Vijay LAGHATE, Shrenik PATEL, Sang-June PARK, Mohammad Ali TASSOUDJI, Sudarsan KRISHNAN, Vasanthan RAGHAVAN, Siddharth KAMATH
  • Publication number: 20180124716
    Abstract: A radio frequency (RF) system including: a modem configured to generate a first set of digital bits and to create an analog RF signal from those digital bits; a power amplifier configured to receive the analog RF signal and to amplify the analog RF signal, the power amplifier including an input for a biasing voltage; a feedback loop configured to sample an output of the power amplifier, generate a second set of digital bits corresponding to the first set of digital bits, digitally process the second set of digital bits to determine a linearity characteristic of the power amplifier, and to adjust the biasing voltage in response to determining the linearity characteristic.
    Type: Application
    Filed: March 29, 2017
    Publication date: May 3, 2018
    Inventors: Sudarsan Krishnan, Andrei Izotov, Carl Hardin, Vijay Chellappa, Li Gao
  • Patent number: 9588574
    Abstract: Embodiments include systems and methods for managing radio power consumption in a mobile communication device. A processor of a mobile communication device may monitor a processing demand of a modem processor in the mobile communication device, and the device processor may compare the processing demand of the modem processor to a demand threshold. The device processor may select a power-saving mode for a radio of the mobile communication device based on the comparing, and the device processor may apply power to the radio based on the selected power-saving mode.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: March 7, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Ankit Maheshwari, Sri Rama Chakravarthy Vollala, Sudarsan Krishnan
  • Publication number: 20160216755
    Abstract: Embodiments include systems and methods for managing radio power consumption in a mobile communication device. A processor of a mobile communication device may monitor a processing demand of a modem processor in the mobile communication device, and the device processor may compare the processing demand of the modem processor to a demand threshold. The device processor may select a power-saving mode for a radio of the mobile communication device based on the comparing, and the device processor may apply power to the radio based on the selected power-saving mode.
    Type: Application
    Filed: February 17, 2015
    Publication date: July 28, 2016
    Inventors: Ankit Maheshwari, Sri Rama Chakravarthy Vollala, Sudarsan Krishnan
  • Patent number: 9130796
    Abstract: A method and apparatus for characterized pre-distortion calibration is provided. The method begins with the selection of a number of devices to be characterized. The number of devices selected may be a subset of a larger group of devices. The selected number of devices is then characterized. The method avoids characterizing the large group of devices. The calibration of the group of devices is then based on the characterization of the selected number of devices.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Sudarsan Krishnan, David Coronel, Jay P. Shah
  • Patent number: 8868056
    Abstract: A method includes receiving, at a device to be calibrated, a data packet from a second device that is directing the calibration. The data packet includes at least two segments, where each segment corresponds to at least one calibration instruction. The method includes conducting a calibration of the device according to the calibration instructions corresponding to the at least two segments.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 21, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Anuj Ojha, Isan A. Doshi, Deepu John, Brian M. George, Sudarsan Krishnan, Benjamin A. Cheadle
  • Publication number: 20140233618
    Abstract: A method and apparatus for self-testing of a radio frequency (RF) chipset is provided. The method requires that a set of test instructions be loaded into a software load station. Once the software is loaded, reference calibration is conducted with test equipment connected. After calibration, the test equipment is disconnected and self-testing of a transmit chain begins. A pre-determined load value is connected and the self-testing process routes a signal from the RF chipset internal modem through a power amplifier, duplexer, first coupler, switch, second coupler, and RF integrated circuit (IC). The apparatus includes a RF chipset that has an internal modem and signal generator as well as processors for processing self-testing of a transmit chain, self-testing of a primary receiver, and self-testing of a diversity receiver chain.
    Type: Application
    Filed: September 25, 2013
    Publication date: August 21, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Sudarsan KRISHNAN, Andrei V. IZOTOV
  • Publication number: 20140233621
    Abstract: A method and apparatus for characterized pre-distortion calibration is provided. The method begins with the selection of a number of devices to be characterized. The number of devices selected may be a subset of a larger group of devices. The selected number of devices is then characterized. The method avoids characterizing the large group of devices. The apparatus includes a processor for performing pre-distortion calibration, a processor for averaging curves for each RF gain index on each channel, and a non-volatile memory.
    Type: Application
    Filed: September 27, 2013
    Publication date: August 21, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Sudarsan KRISHNAN, Andre V. IZOTOV, Michael R. HUGHES, Abhishek Kumar AGRAWAL, Satheesha B. RANGEGOWDA
  • Publication number: 20140023128
    Abstract: A method and apparatus for characterized pre-distortion calibration is provided. The method begins with the selection of a number of devices to be characterized. The number of devices selected may be a subset of a larger group of devices. The selected number of devices is then characterized. The method avoids characterizing the large group of devices. The calibration of the group of devices is then based on the characterization of the selected number of devices.
    Type: Application
    Filed: March 11, 2013
    Publication date: January 23, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Sudarsan Krishnan, David Coronel, Jay P. Shah
  • Publication number: 20130260699
    Abstract: A wireless communication device configured for automatic calibration is described. The wireless communication device includes a testing load. The wireless communication device also includes a transceiver chip. The wireless communication device further includes a radio frequency connector switch that couples circuitry on the transceiver chip to one of the testing load, an external load and a radiating element.
    Type: Application
    Filed: October 4, 2012
    Publication date: October 3, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Udara C. Fernando, Puay H. See, Sudarsan Krishnan
  • Publication number: 20130210411
    Abstract: A method includes receiving, at a device to be calibrated, a data packet from a second device that is directing the calibration. The data packet includes at least two segments, where each segment corresponds to at least one calibration instruction. The method includes conducting a calibration of the device according to the calibration instructions corresponding to the at least two segments.
    Type: Application
    Filed: August 15, 2012
    Publication date: August 15, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: ANUJ OJHA, ISAN A DOSHI, DEEPU JOHN, BRIAN M. GEORGE, SUDARSAN KRISHNAN, BENJAMIN A. CHEADLE
  • Patent number: 8170819
    Abstract: A method for measuring non-linear characteristics of a power amplifier is described. A calibration waveform is calculated during a testing procedure period. Amplitude characteristics of the calibration waveform at the output of the power amplifier are measured during the testing procedure period. Phase characteristics of the calibration waveform at the output of the power amplifier are measured during the testing procedure period. Pre-distortion techniques are configured based on the amplitude characteristics and the phase characteristics to be used during a normal operation period of a transmitter.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: May 1, 2012
    Assignee: QUALCOMM, Incorporated
    Inventors: Revathi Sundara Raghavan, Puay Hoe See, Rema Vaidyanathan, Richard M. Schierbeck, II, Sudarsan Krishnan, Zae Yong Choi
  • Publication number: 20090138226
    Abstract: A method for measuring non-linear characteristics of a power amplifier is described. A calibration waveform is calculated during a testing procedure period. Amplitude characteristics of the calibration waveform at the output of the power amplifier are measured during the testing procedure period. Phase characteristics of the calibration waveform at the output of the power amplifier are measured during the testing procedure period. Pre-distortion techniques are configured based on the amplitude characteristics and the phase characteristics to be used during a normal operation period of a transmitter.
    Type: Application
    Filed: April 23, 2008
    Publication date: May 28, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Revathi Sundara Raghavan, Puay Hoe See, Rema Vaidyanathan, Richard M. Schierbeck, II, Sudarsan Krishnan, Zae Yong Choi