Patents by Inventor Sriram Rajagopal

Sriram Rajagopal 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: 9008734
    Abstract: A wireless communication device is disclosed that is capable of reduced power consumption. Uplink and downlink sub-frames in a WiMAX, 802.16m or LTE environment often include several vacant symbols during which power-hungry hardware and software components need not operate at full power. By analyzing a physical layer beacon and control information of a received signal, the specific locations of data bursts can be determined, as well as periods of needed operation of a receiver module to effectively decode those data bursts. The receiver module can otherwise be controlled to operate in a LOW power state during remaining periods of vacant time, thereby conserving power consumption and extending battery life.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: April 14, 2015
    Assignee: Broadcom Corporation
    Inventors: Shashidhar Vummintala, Gowrisankar Somichetty, Sriram Rajagopal, Sindhu Verma, Manish Airy, Hariprasad Gangadharan, Ramasamy Palanisamy Pugazhanthi, Felix Varghese, Erik Stauffer
  • Publication number: 20150078514
    Abstract: An imaging system (100) includes a gantry (101) that defines an examination region (106) and a subject support (112). The subject support includes a tabletop (116) that supports an object or subject in the examination region for a scan of the object or subject and a base (114) that supports the tabletop. A support frame (132) supports the base. The base is moveably affixed to the support frame and moves between a plurality of predetermined locations, which are based on corresponding distances from the gantry. A support frame drive system (134) moves the base alternatively to one of the plurality of predetermined locations in response to an input signal indicative of the one of the plurality of predetermined locations, which corresponds to a location of interest for the scan of the object or subject.
    Type: Application
    Filed: April 8, 2013
    Publication date: March 19, 2015
    Inventors: Jeremy David Pettinato, Shufang Dong, Sriram Rajagopal, Joanne Marie Stack Oyen
  • Patent number: 8977922
    Abstract: An Acknowledgement-Negative Acknowledgement (ACK-NACK) feedback message transmitted from a receiving device to a source device indicates which code words within a transport block transmitted from the source device to the receiving device were received in error by the receiving device. The ACK-NACK message has a variable format based on the number of code words in the transport block and the number of code words received in error.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: March 10, 2015
    Assignee: Broadcom Corporation
    Inventors: Gowrisankar Somichetty, Sriram Rajagopal
  • Publication number: 20150009836
    Abstract: In MIMO systems employing closed loop link adaptation, channel state information reporting can be enhanced using various types of side information, such as scheduling information indicating constraints on the scheduler related to the generation of downlink MIMO signals.
    Type: Application
    Filed: July 31, 2013
    Publication date: January 8, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Djordje Tujkovic, Gowrisankar Somichetty, Mrinmoy Jana, Sriram Rajagopal
  • Patent number: 8856609
    Abstract: Improved strategies for a Cyclical Redundancy Check (CRC) are disclosed. A CRC check of a codeblock may be initiated by a CRC decoder before receiving all of the bits by a corresponding FEC encoder. Furthermore, an incremental CRC check with respect to the data packet without the need for requesting passed through data from higher layers.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: October 7, 2014
    Assignee: Broadcom Corporation
    Inventors: Shashidhar Vummintala, Arumugam Velayoudame, Gowrisankar Somichetty, Sriram Rajagopal, Sandip Solanki, Kalyana Krishnan
  • Patent number: 8842760
    Abstract: A spatial multiplexing scheduler in, for example, an eNB or other base station, determines rank n precoders for UEs. Each UE reports the preferred precoder from this set of rank n precoders. The preferred precoder results in imbalance in performance over m layers compared to the rest of (n?m) layers. The UEs also report channel quality to the eNB, from which the eNB determines which layer(s) is better for the UE. For example, when n=2 and m=1, the eNB may then select two UEs such that, for the same precoder used by the UEs, the first UE has much higher layer 1 performance than layer 2, and the second UE has much higher layer 2 performance than layer 1. These two UEs may then share the same frequency-time domain resources, with the first UE information sent/received on layer 1, while the second UE information is sent/received on layer 2.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: September 23, 2014
    Assignee: Broadcom Corporation
    Inventors: Sriram Rajagopal, Gowrisankar Somichetty
  • Publication number: 20140155117
    Abstract: A communication device, such as a smart phone, receives a power specification message from a network controller. The power specification message specifies an output power applicable for a particular communication subframe or symbol within the subframe. In response to the power specification message, the communication device determines a new shaping table and replaces an existing shaping table with the new shaping table. The communication device uses the shaping table to generate an envelope signal for an envelope tracking power supply, and the new shaping table is adapted to provide power saving operation at the specified output power.
    Type: Application
    Filed: June 21, 2013
    Publication date: June 5, 2014
    Inventors: Ying Xia, Gowrisankar Somichetty, Bongseok Park, Sriram Rajagopal, Sriraman Dakshinamurthy, Robert Gustav Lorenz
  • Patent number: 8675761
    Abstract: Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: March 18, 2014
    Assignee: Broadcom Corporation
    Inventors: Djordje Tujkovic, Vummintala Shashidhar, Erik Stauffer, Rishi Ranjan, Soumen Chakraborty, Bertrand Hochwald, Sriram Rajagopal, Sam Alex
  • Publication number: 20140023154
    Abstract: A spatial multiplexing scheduler in, for example, an eNB or other base station, determines rank n precoders for UEs. Each UE reports the preferred precoder from this set of rank n precoders. The preferred precoder results in imbalance in performance over m layers compared to the rest of (n?m) layers. The UEs also report channel quality to the eNB, from which the eNB determines which layer(s) is better for the UE. For example, when n=2 and m=1, the eNB may then select two UEs such that, for the same precoder used by the UEs, the first UE has much higher layer 1 performance than layer 2, and the second UE has much higher layer 2 performance than layer 1. These two UEs may then share the same frequency-time domain resources, with the first UE information sent/received on layer 1, while the second UE information is sent/received on layer 2.
    Type: Application
    Filed: March 5, 2013
    Publication date: January 23, 2014
    Applicant: Broadcom Corporation
    Inventors: Sriram Rajagopal, Gowrisankar Somichetty
  • Publication number: 20130340165
    Abstract: A method includes receiving a subject support motion disable signal indicative of at least one of power removal of an imaging system, a collision of a horizontally moving tabletop of the imaging system, a decoupling of a horizontal motion drive system configured to horizontally drive the tabletop, or a collision of a vertically moving subject support of the imaging system, wherein a vertical motion drive system drives the subject support vertical motion, and disabling, in response to receiving the subject support motion disable signal, at least one of tabletop horizontal motion or subject support vertical motion.
    Type: Application
    Filed: March 9, 2012
    Publication date: December 26, 2013
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Shufang Dong, Terrance Joseph Nemenz, Patrick Cumpson, Jeremy David Pettinato, Sriram Rajagopal
  • Publication number: 20130254613
    Abstract: An ACK-NACK feedback message indicates which code words within a transport block that were received in error. The ACK-NACK message has a variable format based on the number of code words in the transport block and the number of code words received in error.
    Type: Application
    Filed: November 27, 2012
    Publication date: September 26, 2013
    Applicant: BROADCOM CORPORATION
    Inventors: Gowrisankar Somichetty, Sriram Rajagopal
  • Patent number: 8476255
    Abstract: Provided herein are novel, stilbene like compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, metabolites, prodrugs, solvates, pharmaceutically acceptable salts and compositions thereof. These compounds can inhibit HDACs and are useful as a therapeutic or ameliorating agent for diseases that are involved in cellular growth such as malignant tumors, autoimmune diseases, skin diseases, infections, inflammation, etc.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: July 2, 2013
    Assignee: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Sridharan Rajagopal, Virendra Kachhadia, Thanasekaran Ponpandian, Abdul Raheem Keeri, Umamaheswari Mani, Suresh Rathinasamy, Praveen Rajendran, Kamaraj Mani, Balaji Ramachandran, Punthalir Narayanaswamy, Sriram Rajagopal
  • Patent number: 8450525
    Abstract: Novel compounds of the general formula (I), having histone deacetylase (HDAC) inhibiting enzymatic activity, their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, intermediates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof. The present invention more particularly provides novel compounds of the general formula (I). Also included is a method for treatment of cancer, psoriasis, proliferative conditions and conditions mediated by HDAC, in a mammal comprising administering an effective amount of a novel compound of formula (I).
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: May 28, 2013
    Assignee: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Sridharan Rajagopal, Virendra Kachhadia, Thanasekaran Ponpandian, Abdul Raheem Keeri, Karnambaram Anandhan, Sriram Rajagopal, Rajendran Praveen, Prabhu Daivasigamani
  • Publication number: 20130132796
    Abstract: The disclosure relates generally to the field of communications in transceiver, and more particularly to improved strategies for Cyclical Redundancy Check (CRC). A CRC check of a codeblock may be initiated by a CRC decoder before receiving all of the bits by a corresponding FEC encoder. Furthermore, an incremental CRC check with respect to the data packet without the need for requesting passed through data from higher layers.
    Type: Application
    Filed: March 29, 2012
    Publication date: May 23, 2013
    Applicant: Broadcom Corporation
    Inventors: Shashidhar VUMMINTALA, Arumugam Velayoudame, Gowrisankar Somichetty, Sriram Rajagopal, Sandip Solanki, Kalyana Krishnan
  • Publication number: 20130130751
    Abstract: A wireless communication device is disclosed that is capable of reduced power consumption. Uplink and downlink sub-frames in a WiMAX, 802.16m or LTE environment often include several vacant symbols during which power-hungry hardware and software components need not operate at full power. By analyzing a physical layer beacon and control information of a received signal, the specific locations of data bursts can be determined, as well as periods of needed operation of a receiver module to effectively decode those data bursts. The receiver module can otherwise be controlled to operate in a LOW power state during remaining periods of vacant time, thereby conserving power consumption and extending battery life.
    Type: Application
    Filed: December 1, 2011
    Publication date: May 23, 2013
    Applicant: Broadcom Corporation
    Inventors: Shashidhar Vummintala, Gowrisankar Somichetty, Sriram Rajagopal, Sindhu Verma, Manish Airy, Hariprasad Gangadharan, Pugazhanthi R.P., Felix Varghese, Erik Stauffer
  • Patent number: 8420653
    Abstract: Described are novel heterocyclic compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof. These compounds are useful in the treatment of immunological diseases, inflammation, pain disorder, rheumatoid arthritis; osteoporosis; multiple myeloma; uveititis; acute and chronic myelogenous leukemia; atherosclerosis; cancer; cachexia; ischemic-induced cell damage; pancreatic beta cell destruction; osteoarthritis; rheumatoid spondylitis; gouty arthritis; inflammatory bowel disease; ARDS; psoriasis; Crohn's disease; allergic rhinitis; ulcerative colitis; anaphylaxis; contact dermatitis; muscle degeneration; asthma; COPD; bone resorption diseases; multiple sclerosis; sepsis; septic shock; toxic shock syndrome and fever. More particularly these compounds are useful as PDE4 inhibitors and are useful for treating PDE4 mediated diseases.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: April 16, 2013
    Assignee: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Visweswara Akella Satya Surya Srinivas, Ravikumar Tadiparthi, Ganapavarapu Veera Raghava Sharma, Thirunavukkarasu Sappanimuthu, Durairaj Peter Bhakiaraj, Virendra Kachhadia, Kilambi Narasimhan, Sathya Narayana Thara, Sriram Rajagopal, Sukunath Narayanan, Venkatesan Parameswaran, Venkatesan Janarthanam, Maruthikumar Narayanam, Sathyanarayana Gadde, Uma Ramachandran, Gopalan Balasubramanian, Narayanan Surendran, Shridhar Narayanan, Lolaknath Santosh Vishwakarma, Sanjeev Saxena, Nishikanth Reddy Gaddam
  • Patent number: 8263044
    Abstract: The present invention relates to novel stilbene like compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts and compositions, metabolites and prodrugs thereof. The present invention more particularly provides novel stilbene like compounds of the general formula (I). Also included is a method for treatment of cancer, psoriasis, proliferative conditions and conditions mediated by HDAC, in a mammal comprising administering an effective amount of a novel compound of formula (I) as described above.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: September 11, 2012
    Assignee: Orchid Research Laboratories Limited
    Inventors: Akella Satya Surya Visweswara Srinivas, Urkalan Kaveri Balan, Narayana Swamy Punthalir, Rama Swamy Velmurugan, Sriram Rajagopal, Gaddam Om Reddy, Virendra Kachhadia
  • Patent number: 8080559
    Abstract: A 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diasterisomer is described which is a better inhibitor of topoisomerase I than either the diastereoisomeric mixture 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin, or the 5(R)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer. Pharmaceutical compositions of the 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer are also described as are methods of using the compound for the inhibition of topoisomerase I and for the treatment of cancer.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: December 20, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Kumar Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Publication number: 20110223870
    Abstract: Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.
    Type: Application
    Filed: June 15, 2010
    Publication date: September 15, 2011
    Applicant: BECEEM COMMUNICATIONS INC.
    Inventors: Djordje Tujkovic, Vummintala Shashidhar, Erik Stauffer, Rishi Ranjan, Soumen Chakraborty, Bertrand Hochwald, Sriram Rajagopal, Sam Alex
  • Publication number: 20110212943
    Abstract: Provided herein are novel bridged cyclic derivatives of the general formula (I), their analogs, tautomeric forms, stereoisomers, polymorphs, solvates, intermediates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof. These compounds can inhibit HDACs and are useful as therapeutic or ameliorating agent for diseases that are involved in cellular growth such as malignant tumors, autoimmune diseases, skin diseases, infections, inflammation, neurode-generative disorders etc.
    Type: Application
    Filed: October 14, 2009
    Publication date: September 1, 2011
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Gopalan Balasubramanian, Ponpandian Thanasekaran, Sridharan Rajagopal, Bharathimohan Kuppusamy, Virendra Kachhadia, Vignesh Radhakrishnan, Sivasudar Velaiah, Shridhar Narayanan, Mandar Bhonde, Praveen Rajendran, Sriram Rajagopal