Patents by Inventor Chandra Sekhar

Chandra Sekhar 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).

  • Patent number: 10904877
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises adaptively designating, by a network element following a frame-based communication protocol, for use as a secondary component carrier in a carrier aggregation scheme, at least a portion of radio resources on an unlicensed band.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: January 26, 2021
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar
  • Publication number: 20210019142
    Abstract: Described herein is a system and method for detecting correlated changes (e.g., between code files and configuration files). For a plurality of code files and a plurality of configuration files, a correlated change model is trained to identify correlated changes across the code files and the configuration files using a machine learning algorithm that discovers change rules using a support parameter, and, a confidence parameter, and, a refinement algorithm that refines the discovered change rules. The correlated change model comprising the change rules is stored. The correlated change model can be used to identify potential issue(s) regarding a particular file (e.g., changed code or configuration file(s)). Information regarding the identified potential issue(s) can be provided to a user.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 21, 2021
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Ranjita BHAGWAN, Chandra Sekhar MADDILA, Aditya KUMAR, Sumit ASTHANA, Rahul KUMAR, Sonu MEHTA, Chetan BANSAL, Balasubramanyan ASHOK, Christian Alma BIRD
  • Patent number: 10897334
    Abstract: A node including processing circuitry including a processor, and a memory, the memory containing instructions that, when executed by the processor, configure the processor to: determine a cluster of a plurality of cells, assign at least one ZP CSI-RS configuration to each of the plurality of cells of the cluster, assign to each cell in the plurality of cells of the cluster a respective NZP CSI-RS configuration in which each of the NZP CSI-RS configurations assigned to respective cells in the cluster partially overlapping the at least one ZP CSI-RS configuration, and cause a first cell of the plurality of cells of the cluster to transmit, within a subframe, based on the at least one ZP CSI-RS configuration and the NZP CSI-RS configuration assigned to the first cell.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: January 19, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Chandra Sekhar Bontu, Girum Alebachew Fantaye, Mercy George, Jianguo Long, Hua Xu
  • Publication number: 20210011455
    Abstract: A machine or autonomous system includes a diagnostic controller and is configured to perform a method for monitoring health of a machine. The method includes monitoring a set of first electrical signals indicative of control of a motor of the machine while the machine is operated in a first autonomous mode, determining that an abnormal operating condition has occurred in response to the set of first electrical signals meeting a first criteria, having the machine operate in a test mode in response to the determination that the abnormal operating condition has occurred, monitoring a set of second electrical signals indicative of control of the motor during the test mode, and determining a fault condition in response to the set of second electrical signals meeting a second criteria.
    Type: Application
    Filed: July 8, 2019
    Publication date: January 14, 2021
    Applicant: Ford Global Technologies, LLC
    Inventors: Chandra Sekhar Jalluri, Youssef Ziada, Annette Januszczak, Himanshu Rajoria, Timothy George Beyer
  • Patent number: 10891960
    Abstract: A method of coding for multi-channel audio signals includes estimating comparison values at an encoder indicative of an amount of temporal mismatch between a reference channel and a corresponding target channel. The method includes smoothing the comparison values to generate short-term and first long-term smoothed comparison values. The method includes calculating a cross-correlation value between the comparison values and the short-term smoothed comparison values. The method also includes adjusting the first long-term smoothed comparison values in response to comparing the cross-correlation value with a threshold. The method further includes estimating a tentative shift value and non-causally shifting the target channel by a non-causal shift value to generate an adjusted target channel. The non-causal shift value is based on the tentative shift value. The method further includes generating, based on reference channel and the adjusted target channel, at least one of a mid-band channel or a side-band channel.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: January 12, 2021
    Assignee: Qualcomm Incorproated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Patent number: 10891961
    Abstract: A device includes a receiver configured to receive an encoded bitstream from a second device. The encoded bitstream includes a temporal mismatch value. The device also includes a decoder configured to decode the encoded bitstream to generate a first signal and a second signal. Based on the temporal mismatch value, the decoder is configured to map one of the first signal or the second signal as a decoded target channel. The decoder is also configured to perform a shift operation on the decoded target channel based on the temporal mismatch value to generate an adjusted decoded target channel. The device also includes an output device configured to output a first output signal and a second output signal. The second output signal is based on the adjusted decoded target channel.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: January 12, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Publication number: 20210006316
    Abstract: Systems and methods for estimating Signal-to-Noise Ratio (SNR) for Multi-User Multiple-Input and Multiple-Output (MU-MIMO) based on channel orthogonality. In some embodiments, a method performed by a radio access node includes obtaining a SU-MIMO signal quality measurement for at least a first user and an additional user; obtaining an indication of orthogonality between a channel of the first user and a channel of the additional user; and estimating a MU-MIMO signal quality measurement for the first user as if the first user and the additional user are paired with each other for a potential MU-MIMO transmission based on the SU-MIMO signal quality measurements and the indication of orthogonality. In this way, a computational complexity for the SINR estimation of MU-MIMO users can be greatly reduced. This may enable a large number of user pairing alternatives to be evaluated in practical wireless systems to achieve improved MU-MIMO performance.
    Type: Application
    Filed: February 28, 2019
    Publication date: January 7, 2021
    Inventors: Jianguo Long, Mats Ã…hlander, Chandra Sekhar Bontu, Yongquan Qiang, Hong Ren
  • Patent number: 10885922
    Abstract: A method includes decoding a low-band portion of an encoded mid channel to generate a decoded low-band mid channel. The method also includes filtering the decoded low-band mid channel according to one or more filter coefficients to generate a low-band filtered mid channel. The method also includes generating an inter-channel predicted signal based on the low-band filtered mid channel and the inter-channel prediction gain. The method further includes generating a low-band left channel and a low-band right channel based on an up-mix factor, the decoded low-band mid channel, and the inter-channel predicted signal.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: January 5, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Daniel Jared Sinder
  • Patent number: 10885921
    Abstract: A method includes receiving, at an audio encoder, multiple streams of audio data. The method includes assigning a priority to each stream of the multiple streams and determining, based on the priority of each stream of the multiple streams, a permutation sequence for encoding of the multiple streams. The method also includes encoding at least a portion of each stream of the multiple streams according to the permutation sequence.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: January 5, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Daniel Jared Sinder
  • Patent number: 10885925
    Abstract: A method includes processing a time-domain decoded high-band mid signal to generate a time-domain high-band residual prediction signal. The method also includes generating a high-band left channel and a high-band right channel based on the time-domain decoded high-band mid signal and the time-domain high-band residual prediction signal.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: January 5, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam
  • Publication number: 20200403673
    Abstract: Embodiments of a method in a base station for precoding a downlink transmission are disclosed. In some embodiments, the method comprises obtaining, for a time instant k, an estimate of a channel matrix for a wireless channel for a downlink from the base station to a wireless device and projecting the estimate of the channel matrix onto one or more sets of spatial orthonormal functions, thereby obtaining respective sets of coefficients. The method further comprises, for each set of spatial orthonormal functions, filtering the set of coefficients for the time instant k based on a filtering parameter that is specific to a downlink channel to be transmitted. The method further comprises generating beamforming weights using the filtered set of coefficients for at least one of the sets of spatial orthonormal functions, and precoding the downlink channel using the beamforming weights.
    Type: Application
    Filed: April 18, 2018
    Publication date: December 24, 2020
    Inventors: Chandra Sekhar BONTU, Mats Ã…HLANDER, Magnus HURD, Anders JOHANSSON, Hong REN
  • Patent number: 10872611
    Abstract: A method for multi-channel audio or speech signal processing includes receiving a reference channel and a target channel, determining a variation between a first mismatch value and a second mismatch value, and comparing the variation with a first threshold that may have a pre-determined value or may be adjusted based on a frame type or a smoothing factor. The method also includes adjusting a set of target samples of the target channel based on the variation and based on the comparison to generate an adjusted set of target samples. Adjusting the set of target samples includes selecting one among a first interpolation and a second interpolation based on the variation. The method further includes generating at least one encoded channel based on a set of reference samples and the adjusted set of target samples. The method also includes transmitting the at least one encoded channel to a second device.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: December 22, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Patent number: 10872613
    Abstract: A method includes generating a synthesized non-reference high-band channel based on a non-reference high-band excitation corresponding to a non-reference target channel. The method further includes estimating one or more spectral mapping parameters based on the synthesized non-reference high-band channel and a high-band portion of the non-reference target channel. The method also includes applying the one or more spectral mapping parameters to the synthesized non-reference high-band channel to generate a spectrally shaped synthesized non-reference high-band channel. The method further includes generating an encoded bitstream based on the one or more spectral mapping parameters and the spectrally shaped synthesized non-reference high-band channel.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: December 22, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Publication number: 20200389331
    Abstract: A method, computing system, and computer program product are provided. A processor of a computer system estimates an amount of bandwidth to be used to complete a transaction based on a usage history. Responsive to determining that the amount of the estimated bandwidth to be used exceeds a predefined threshold of an amount of available bandwidth and to determining that an account has any offers for additional bandwidth at no additional cost, the amount of available bandwidth is automatically recharged using at least some of the any offers until either the any offers are exhausted or the estimated amount of the bandwidth to be used would be less than the predefined threshold. When the estimated amount of the bandwidth to be used continues to exceed the predefined threshold, the bandwidth is automatically recharged using an advanced amount of bandwidth to increase a likelihood that the transaction will complete successfully.
    Type: Application
    Filed: June 5, 2019
    Publication date: December 10, 2020
    Inventors: Venkata Vara Prasad Karri, Kamal Kiran Trood Yamala, Naga Srinivasa reddy Padala, Chandra Sekhar Kalyan Devulapalli
  • Publication number: 20200382145
    Abstract: A quadplexer providing improved insertion loss and pass band steepness is provided. The quadplexer comprises a first filter structure with a first filter element, a second filter structure with a second filter element and an inductive element that is electrically connected in series between common ports of the filter structures and input ports of the filter elements.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 3, 2020
    Inventors: Chandra Sekhar Reddy KAIPA, Ravi Kiran CHALLA, Chee Wee SIM
  • Patent number: 10854212
    Abstract: A method includes performing modifying, at a decoder, at least a portion of inter-channel phase difference (IPD) parameter values based on a mismatch value to generate modified IPD parameter values. The mismatch value is indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel. The modified IPD parameter values are applied to a decoded frequency-domain mid channel during an up-mix operation.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: December 1, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam
  • Patent number: 10856233
    Abstract: A method and network entity for extending communication coverage in a network between a network entity and a wireless device. The method includes determining that the wireless device qualifies for coverage extension, the determining including that deriving appropriate transmission parameters for the wireless devices results in one of a lowest possible or most robust modulation and coding scheme (MCS), and determining achievable transmission performance parameters for the wireless device. If the determined achievable transmission performance parameters do not meet a set of pre-established transmission criteria, the downlink transmission power to the wireless device is increased.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: December 1, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Chandra Sekhar Bontu, Peter Hazy, Michael McKenna
  • Patent number: 10854209
    Abstract: A method includes receiving, at an audio encoder, multiple streams of audio data, where N is the number of the received multi streams. The method includes determining a similarity value for each stream of the multiple streams and comparing the similarity value for each stream of the multiple streams with a threshold. The method also includes identifying, based on the comparison, L (L<N) number of streams to be encoded among the N number of the multiple streams. The method includes encoding the identified L number of streams to generate an encoded bitstream.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: December 1, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam
  • Patent number: 10847170
    Abstract: A device for signal processing with a receiver that receives an encoded audio signal comprising a parameter, and based on the value of parameter selects one non-linear processing function for generating a first excitation signal, a second non-linear processing function for generating a second excitation signal, and generates a high-band excitation signal based on the first excitation signal and second excitation signal.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: November 24, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam
  • Patent number: 10839814
    Abstract: A device includes a receiver and a decoder. The receiver is configured to receive bitstream parameters corresponding to at least an encoded mid signal. The decoder is configured to generate a synthesized mid signal based on the bitstream parameters. The decoder is also configured to generate one or more upmix parameters. An upmix parameter of the one or more upmix parameters having a first value or a second value based on determining whether the bitstream parameters correspond to an encoded side signal. The first value is based on a received downmix parameter. The second value is based at least in part on a default parameter value. The decoder is further configured to generate an output signal based on the synthesized mid signal and the one or more upmix parameters.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 17, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam