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).
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Patent number: 12143165Abstract: 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: GrantFiled: August 18, 2023Date of Patent: November 12, 2024Assignee: QUALCOMM IncorporatedInventors: 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
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Publication number: 20230403089Abstract: 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: ApplicationFiled: August 18, 2023Publication date: December 14, 2023Inventors: 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
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Patent number: 11764888Abstract: 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: GrantFiled: June 4, 2020Date of Patent: September 19, 2023Assignee: QUALCOMM IncorporatedInventors: 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
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Publication number: 20200389238Abstract: 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: ApplicationFiled: June 4, 2020Publication date: December 10, 2020Inventors: 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
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Publication number: 20180124716Abstract: 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: ApplicationFiled: March 29, 2017Publication date: May 3, 2018Inventors: Sudarsan Krishnan, Andrei Izotov, Carl Hardin, Vijay Chellappa, Li Gao
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Patent number: 9588574Abstract: 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: GrantFiled: February 17, 2015Date of Patent: March 7, 2017Assignee: QUALCOMM IncorporatedInventors: Ankit Maheshwari, Sri Rama Chakravarthy Vollala, Sudarsan Krishnan
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Publication number: 20160216755Abstract: 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: ApplicationFiled: February 17, 2015Publication date: July 28, 2016Inventors: Ankit Maheshwari, Sri Rama Chakravarthy Vollala, Sudarsan Krishnan
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Patent number: 9130796Abstract: 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: GrantFiled: March 11, 2013Date of Patent: September 8, 2015Assignee: QUALCOMM IncorporatedInventors: Sudarsan Krishnan, David Coronel, Jay P. Shah
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Patent number: 8868056Abstract: 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: GrantFiled: August 15, 2012Date of Patent: October 21, 2014Assignee: QUALCOMM IncorporatedInventors: Anuj Ojha, Isan A. Doshi, Deepu John, Brian M. George, Sudarsan Krishnan, Benjamin A. Cheadle
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Publication number: 20140233621Abstract: 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: ApplicationFiled: September 27, 2013Publication date: August 21, 2014Applicant: QUALCOMM IncorporatedInventors: Sudarsan KRISHNAN, Andre V. IZOTOV, Michael R. HUGHES, Abhishek Kumar AGRAWAL, Satheesha B. RANGEGOWDA
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Publication number: 20140233618Abstract: 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: ApplicationFiled: September 25, 2013Publication date: August 21, 2014Applicant: QUALCOMM IncorporatedInventors: Sudarsan KRISHNAN, Andrei V. IZOTOV
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Publication number: 20140023128Abstract: 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: ApplicationFiled: March 11, 2013Publication date: January 23, 2014Applicant: QUALCOMM INCORPORATEDInventors: Sudarsan Krishnan, David Coronel, Jay P. Shah
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Publication number: 20130260699Abstract: 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: ApplicationFiled: October 4, 2012Publication date: October 3, 2013Applicant: QUALCOMM INCORPORATEDInventors: Udara C. Fernando, Puay H. See, Sudarsan Krishnan
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Publication number: 20130210411Abstract: 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: ApplicationFiled: August 15, 2012Publication date: August 15, 2013Applicant: QUALCOMM INCORPORATEDInventors: ANUJ OJHA, ISAN A DOSHI, DEEPU JOHN, BRIAN M. GEORGE, SUDARSAN KRISHNAN, BENJAMIN A. CHEADLE
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Patent number: 8170819Abstract: 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: GrantFiled: April 23, 2008Date of Patent: May 1, 2012Assignee: QUALCOMM, IncorporatedInventors: Revathi Sundara Raghavan, Puay Hoe See, Rema Vaidyanathan, Richard M. Schierbeck, II, Sudarsan Krishnan, Zae Yong Choi
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Publication number: 20090138226Abstract: 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: ApplicationFiled: April 23, 2008Publication date: May 28, 2009Applicant: QUALCOMM INCORPORATEDInventors: Revathi Sundara Raghavan, Puay Hoe See, Rema Vaidyanathan, Richard M. Schierbeck, II, Sudarsan Krishnan, Zae Yong Choi