Patents by Inventor Ramakrishna Yellapantula

Ramakrishna Yellapantula 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: 10003418
    Abstract: A testing apparatus obtains user equipment (UE) parametric measurements with unknown and/or unavailable authentication and security information. The testing apparatus may obtain uplink and downlink parameters of a wireless device after the wireless device initiates registration while an associated timer is activated, enabling the testing apparatus to obtain additional measurement information without security information about the tested wireless device. The apparatus may also measure the UE's transmitted power level prior to the initiation of the authentication procedure. The testing apparatus may determine if a wireless device is to be tested at another frequency pair. If so, the testing apparatus redirects the wireless device to a radio resource at the other frequency pair. The testing apparatus then obtains uplink and downlink parameters for the wireless device by performing pre-registration and intra-registration measurements at the other frequency pair.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: June 19, 2018
    Assignee: LitePoint Corporation
    Inventors: Ramakrishna Yellapantula, Chandra Punyapu, Malhar Vaishnav, Soumyadeep Banerjee
  • Patent number: 9749097
    Abstract: A method for wireless communications testing using downlink (DL) signal transmissions from an access point to a mobile terminal and uplink (UL) signal transmissions from said mobile terminal to said access point. Accurate block error rate (BLER) testing of LTE mobile devices in a wireless signal environment is enabled by preventing repeated transmissions of the same downlink (DL) data block that would normally follow reception of uplink (UL) transmissions of negative UL acknowledgments (NACKs) caused by failures to decode prior DL data transmissions, thereby producing cumulative NACK counts accurately reflecting data reception errors.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: August 29, 2017
    Assignee: LitePoint Corporation
    Inventors: Ramakrishna Yellapantula, Soumyadeep Banerjee, Steve Lawrence Sheya
  • Patent number: 9608894
    Abstract: Method for testing one or more of a group of radio frequency (RF) data packet signal transceiver devices under test (DUTs) with reduced signal interference from the remaining DUTs. A tester broadcasts a signal containing power control instructions about uplink signal power characteristics for communication with the tester. For example, for the LTE 3GPP standards, such characteristics could include power ramping step size, preamble initial received target power or maximum number of preamble transmissions for uplink signals transmitted from the DUTs. Following initiation of communication between the tester and one or more DUTs, the tester broadcasts a signal containing power control instructions to instruct the remaining DUTs to transmit any future signals with different uplink signal power characteristics.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: March 28, 2017
    Assignee: LitePoint Corporation
    Inventors: Steve Lawrence Sheya, Soumyadeep Banerjee, Ramakrishna Yellapantula
  • Publication number: 20160359591
    Abstract: A method for wireless communications testing using downlink (DL) signal transmissions from an access point to a mobile terminal and uplink (UL) signal transmissions from said mobile terminal to said access point. Accurate block error rate (BLER) testing of LTE mobile devices in a wireless signal environment is enabled by preventing repeated transmissions of the same downlink (DL) data block that would normally follow reception of uplink (UL) transmissions of negative UL acknowledgments (NACKs) caused by failures to decode prior DL data transmissions, thereby producing cumulative NACK counts accurately reflecting data reception errors.
    Type: Application
    Filed: June 4, 2015
    Publication date: December 8, 2016
    Inventors: Ramakrishna YELLAPANTULA, Soumyadeep Banerjee, Steve Lawrence Sheya
  • Publication number: 20160359718
    Abstract: Method for calibrating an over-the air (OTA) test system for testing multiple radio frequency (RF) data packet signal transceiver devices under test (DUTs), as well as using such a calibrated OTA test system for performing such tests. Calibration is achieved by placing a known good device (KGD) in multiple defined locations within the OTA test system, radiating the KGD with RF test signals at each location, and collecting from the KGD at each location channel quality information identifying optimal RF test signal sub-band channels for ensuring reliable communications within the test system. Use of such system includes placing multiple DUTs at the defined locations within the OTA test system and communicating with them wirelessly via the identified optimal RF test signal sub-band channels.
    Type: Application
    Filed: June 5, 2015
    Publication date: December 8, 2016
    Inventors: Soumyadeep BANERJEE, Steve Lawrence Sheya, Ramakrishna Yellapantula
  • Publication number: 20160359717
    Abstract: Method for testing one or more of a group of radio frequency (RF) data packet signal transceiver devices under test (DUTs) with reduced signal interference from the remaining DUTs. A tester broadcasts a signal containing power control instructions about uplink signal power characteristics for communication with the tester. For example, for the LTE 3GPP standards, such characteristics could include power ramping step size, preamble initial received target power or maximum number of preamble transmissions for uplink signals transmitted from the DUTs. Following initiation of communication between the tester and one or more DUTs, the tester broadcasts a signal containing power control instructions to instruct the remaining DUTs to transmit any future signals with different uplink signal power characteristics.
    Type: Application
    Filed: June 4, 2015
    Publication date: December 8, 2016
    Inventors: Steve Lawrence SHEYA, Soumyadeep BANERJEE, Ramakrishna YELLAPANTULA
  • Patent number: 8660063
    Abstract: A method (300) and apparatus (200) for cell detection in a wireless communication system may include acquiring (315), using a transceiver, synchronization to first radio frame boundaries of a first physical channel from a cell. The method may include attempting to decode frames (320) of a second physical channel that has second radio frame boundaries that are a multiple of the first radio frame boundaries. The method may include performing (325) a cyclic redundancy check on the frames of the second physical channel. The method may include extracting (345) predictable information from a payload from frames that fail the cyclic redundancy check.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: February 25, 2014
    Assignee: Intel Corporation
    Inventors: Ramakrishna Yellapantula, Karthik Nagasubramanian, Brett Robertson
  • Patent number: 8312329
    Abstract: A system and method is disclosed for testing a communication device. In accordance with the described invention, a single vector signal generator (VSG) is utilized to test manufactured 2x2, 3x2 and 4x2 MIMO wireless devices to identify possible manufacturing defects that may impair or disable the device under test (DUT) receivers from properly receiving constituted MIMO TX signals and accurately decoding the bits/symbols conveyed by transmitted TX signals. Disclosed embodiments may include a VSG coupled to a DUT. The VSG being configured to transmit data packets as a first codeword and a second codeword, wherein the VSG includes software and hardware architecture to manipulate the first codeword and the second codeword as emulated first and second waveforms, wherein the first waveform is different than the second waveform. The DUT being configured to receive the emulated first and second waveforms as prescribed signals from the VSG.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: November 13, 2012
    Assignee: Litepoint Corporation
    Inventors: Ramakrishna Yellapantula, Yinghui Li, Dirk J. M. Walvis
  • Publication number: 20120020335
    Abstract: A method (300) and apparatus (200) for cell detection in a wireless communication system may include acquiring (315), using a transceiver, synchronization to first radio frame boundaries of a first physical channel from a cell. The method may include attempting to decode frames (320) of a second physical channel that has second radio frame boundaries that are a multiple of the first radio frame boundaries. The method may include performing (325) a cyclic redundancy check on the frames of the second physical channel. The method may include extracting (345) predictable information from a payload from frames that fail the cyclic redundancy check.
    Type: Application
    Filed: July 23, 2010
    Publication date: January 26, 2012
    Applicant: Motorola, Inc.
    Inventors: RamaKrishna Yellapantula, Karthik Nagasubramanian, Brett Robertson
  • Publication number: 20060210004
    Abstract: A communication controller and a method is provided for synchronizing a wireless communication device and a wireless communication network having two or more transmit antennas, which support transmit diversity. The communication controller and method generally provide for receiving a reference signal from the wireless communication network via each one of at least a pair of the two or more transmit antennas. A preferred phase offset is then determined for the at least pair of transmit antennas, and then transmitted to the wireless communication network.
    Type: Application
    Filed: December 28, 2004
    Publication date: September 21, 2006
    Inventors: Ramakrishna Yellapantula, Joanne Beaumont, Vivek Ramaprasad, Brett Robertson
  • Publication number: 20050152279
    Abstract: A method in a wireless communications device, for example, 3GPP W-CDMA wireless mobile user equipment, including receiving a slot-structured signal having a dedicated control channel and a dedicated data channel, estimating a first SIR (410) on the dedicated control channel, estimating a second SIR (420) on the dedicated data channel if a symbol on the dedicated data channel contains data, weighting the first and second SIR estimates (430), and summing (440) the first SIR and the second SIR estimates after weighting.
    Type: Application
    Filed: January 13, 2004
    Publication date: July 14, 2005
    Inventors: Brett Robertson, Ramnath Dalal, Ramakrishna Yellapantula