Patents by Inventor Louis Robert Litwin

Louis Robert Litwin 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: 8527621
    Abstract: A method includes scanning to detect presence of a wireless local area network WLAN, detecting presence of said wireless local area network, contacting a base station of said wireless local area network detected to request the location of said base station, and receiving location of said wireless area network.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: September 3, 2013
    Assignee: Thomson Licensing
    Inventor: Louis Robert Litwin
  • Patent number: 8441914
    Abstract: A method and apparatus for controlling a primary cell search operation including generating a profile of correlation peaks, determining if magnitudes of the correlation peaks vary, synchronizing a signal acquisition process to one of the identified correlation peak having a greatest magnitude if the magnitudes of the correlation peaks remain relatively constant and synchronizing the signal acquisition process to a peak whose magnitude is increasing if the magnitudes of the correlation peaks are changing. The method and apparatus further include identifying an index and a magnitude of a largest correlation peak of the correlation peaks, determining if other correlation peaks exist in the profile, synchronizing the signal acquisition process to the largest correlation peak originally identified if other correlation peaks do not exist, storing indices and magnitudes for all other correlation peaks located and comparing changes in correlation peak magnitudes for all previously identified peaks.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: May 14, 2013
    Assignee: Thomson Licensing
    Inventors: Louis Robert Litwin, Manoj Viswambharan
  • Patent number: 8442094
    Abstract: A spread spectrum receiver configured to perform cell searching can include a cell search system and a searcher. The cell search system is configured to perform primary and secondary synchronization, thereby identifying a scrambling code group. The searcher is configured to determine a scrambling code from the scrambling code group identified by the cell search system.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: May 14, 2013
    Assignee: Thomson Licensing
    Inventors: Alton Shelborne Keel, Louis Robert Litwin
  • Patent number: 8306391
    Abstract: A method for operating a data reproduction device enables users to resume reproduction of audio and/or video content across different devices of the same or different type. According to an exemplary embodiment, the method includes steps of receiving first index data from a different data reproduction device wherein the first index data indicates a first position in content in a first format and the content includes at least one of audio and video data, determining a second position in the content in a second format using the first index data, and enabling reproduction of the content in the second format beginning from the second position.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: November 6, 2012
    Assignee: Thomson Licensing
    Inventors: Manoj Viswambharan, Louis Robert Litwin
  • Patent number: 8184523
    Abstract: An Orthogonal Frequency Division Multiplexing (OFDM) receiver that employs N second-order phase-lock loops sharing a common integrator (where N is the number of pilots in the system). The N second order phase-lock loops track out independent pilot phase rotations to facilitate the constructive averaging of the pilots' phase information. At the same time, by sharing a common integrator, the OFDM receiver takes advantage of noise averaging over multiple pilots to obtain a cleaner frequency offset estimation. The OFDM receiver may also compensate for FFT window drift by calculating a phase difference between a selected pair of pilots and tracking the rate of change of the calculated phase difference over time. The calculated phase difference is used to control the position of an upstream FFT window after a predetermined phase difference threshold is exceeded. The tracked rate of change is used to continuously adjust the phase of downstream equalizer taps.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: May 22, 2012
    Assignee: Thompson Licensing
    Inventors: Maxim Borisovich Belotserkovsky, Vincent Demoulin, Louis Robert Litwin, Jr.
  • Patent number: 8134981
    Abstract: An apparatus including a second stage correlator for receiving input data from a first stage correlator, wherein said second stage correlator includes a memory is described. A method for performing a second stage correlation on data including resetting a read pointer and a write pointer, alternatively multiplexing input data into one of a pair of storage registers, concatenating contents of the pair of storage registers, writing the concatenated contents into a memory in accordance with the write pointer, outputting the concatenated contents from the memory into a read register in accordance with the read pointer, updating the read address pointer and updating the write address pointer is also described.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: March 13, 2012
    Assignee: Thomson Licensing
    Inventor: Louis Robert Litwin
  • Patent number: 8059776
    Abstract: A Universal Mobile Telecommunications System (UMTS) receiver comprises an adjustable delay line, a secondary synchronization processor and a controller. The secondary synchronization processor performs frame synchronization on a received wireless signal that is provided via the adjustable delay line. The controller varies the sub-chip timing delays provided by the adjustable delay line until a measure of accuracy of the frame synchronization process exceeds a predetermined threshold, upon which frame synchronization occurs.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: November 15, 2011
    Assignee: Thomson Licensing
    Inventors: Alton Shelborne Keel, Louis Robert Litwin
  • Patent number: 8019317
    Abstract: A system and method for supporting updates of database contact information to mobile communications devices includes a system having a data entry computer for compiling database contact information for a group of mobile communications devices, a service provider computer server in signal communication with the data entry computer for uploading the database contact information into the service provider computer server and for downloading the database contact information substantially simultaneously to the group of mobile communications devices, and a mobile communications device in signal communication with the service provider computer server for receiving the database contact information and for updating its own global logical database; wherein the method for supporting updates of database contact information to mobile communications devices includes the steps of compiling database contact information for a group of mobile communications devices, uploading the database contact information to a service provid
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: September 13, 2011
    Assignee: Thomson Licensing
    Inventor: Louis Robert Litwin
  • Patent number: 7903722
    Abstract: An apparatus comprises a receiver for receiving a multipath signal and a searcher that stores delayed samples of the received multipath signal, wherein the searcher is operative on the delayed samples of the received multipath signal for identifying one or more paths of the received multipath signal.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: March 8, 2011
    Assignee: Thomson Licensing
    Inventors: Alton Shelborne Keel, Louis Robert Litwin, Zoran Kostic
  • Patent number: 7760616
    Abstract: The disclosed embodiments relate to exploiting circuitry that exists in a typical Orthogonal Frequency Division Multiplexing (OFDM) receiver to find the phase of a complex number corresponding to an input signal without implementing additional costly circuitry or employing a relatively slow inverse tangent look-up table. The magnitude of the complex number is normalized and processed through a closed loop to produce an output proportional to the phase of the complex number.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: July 20, 2010
    Assignee: Thomson Licensing
    Inventors: Maxim Borisovich Belotserkovsky, Vincent Demoulin, Louis Robert Litwin
  • Patent number: 7725443
    Abstract: A system and method for allowing users to associate various e-mails within at least one of the user's mailboxes under a common discussion topic or “thread” for organizational purposes. This user-controlled organization may be carried out regardless if the e-mails which are desired to be associated are from different senders and/or have different subject headings. An e-mail message may be associated to/designated under a user-defined discussion topic or associated to another e-mail. At the user's discretion, information about the e-mail's associated discussion topic and/or associated e-mails may be stored and kept locally with the user's mailbox, or alternatively, information about the e-mail's associations may be transmitted when that e-mail is sent to a recipient user.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: May 25, 2010
    Assignee: Thomson Licensing
    Inventors: Louis Robert Litwin, Purvin Bibhas Pandit
  • Patent number: 7697410
    Abstract: The disclosed embodiments relate to a centralized buffer architecture for an Orthogonal Frequency Division Multiplexing (OFDM) receiver. In this architecture, a central buffer is shared by the main functional blocks or modules of the OFDM receiver. A state machine enables access to the buffer by the functional blocks to maintain buffer coherency.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: April 13, 2010
    Assignee: Thomson Licensing
    Inventors: Maxim Borisovich Belotserkovsky, Vincent Demoulin, Louis Robert Litwin
  • Patent number: 7684472
    Abstract: The disclosed embodiments may relate to a method and apparatus for performing a correlation with respect to a received signal. A first correlator may correlate for a real part of a first characteristic of the received signal to produce a first real correlated signal. A second correlator may correlate for an imaginary part of the first characteristic of the received signal to produce a first imaginary correlated signal. A third correlator may correlate for a real part of a second characteristic of the received signal to produce a second real correlated signal. A fourth correlator may correlate for an imaginary part of the second characteristic of the received signal to produce a second imaginary correlated signal.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: March 23, 2010
    Assignee: Thomson Licensing
    Inventors: Louis Robert Litwin, Alton Shelborne Keel, Wen Gao
  • Patent number: 7639732
    Abstract: A code-tracking system includes a loop filter, which receives an early/late error signal and outputs a loop filter error signal. An error scaling device receives the loop filter error representing an update and provides a code tracking adjustment signal. A controller monitors a frequency of updates and/or a number of same direction updates and provides a filter coefficient in accordance with the frequency of updates and/or the number of same direction updates.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: December 29, 2009
    Assignee: Thomson Licensing
    Inventors: Zoran Kostic, Louis Robert Litwin
  • Publication number: 20090310030
    Abstract: A mobile digital TV (DTV) comprises a DTV receiver, a processor, a Global Positioning System (GPS) receiver and a memory for storing a data base of transmitter frequencies and transmitter locations for particular channels. The GPS receiver provides a location for the mobile DTV to the processor. The processor monitors distances between the location of the mobile DTV and at least two of the transmitter locations for a currently selected channel. Upon detecting that the mobile DTV is closer to a particular transmitting location than the other, the processor re-tunes the mobile DTV to the transmitter frequency of the closest transmitting for the currently selected channel.
    Type: Application
    Filed: June 16, 2005
    Publication date: December 17, 2009
    Applicant: THOMSON LICENSING
    Inventors: Louis Robert Litwin, Eric Andrew Dorsey, Padmanabha R. Rao
  • Publication number: 20090307332
    Abstract: A method and apparatus for caching content are described including storing content on a content server, differentiating between pieces of content and storing a portion of the differentiated content at a cache server proximate to a user.
    Type: Application
    Filed: April 22, 2005
    Publication date: December 10, 2009
    Inventor: Louis Robert Litwin
  • Publication number: 20090274453
    Abstract: A method for operating a data reproduction device enables users to resume reproduction of audio and/or video content across different devices of the same or different type. According to an exemplary embodiment, the method includes steps of receiving first index data from a different data reproduction device wherein the first index data indicates a first position in content in a first format and the content includes at least one of audio and video data, determining a second position in the content in a second format using the first index data, and enabling reproduction of the content in the second format beginning from the second position.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 5, 2009
    Inventors: Manoj Viswambharan, Louis Robert Litwin
  • Publication number: 20090135782
    Abstract: An apparatus including a second stage correlator for receiving input data from a first stage correlator, wherein said second stage correlator includes a memory is described. A method for performing a second stage correlation on data including resetting a read pointer and a write pointer, alternatively multiplexing input data into one of a pair of storage registers, concatenating contents of the pair of storage registers, writing the concatenated contents into a memory in accordance with the write pointer, outputting the concatenated contents from the memory into a read register in accordance with the read pointer, updating the read address pointer and updating the write address pointer is also described.
    Type: Application
    Filed: July 26, 2005
    Publication date: May 28, 2009
    Applicant: THOMSON LICENSING
    Inventor: Louis Robert Litwin
  • Publication number: 20090076907
    Abstract: A technique for providing media content such as advertisements enables, among other things, advertisers to schedule their advertisements more effectively and accurately determine the number of consumers that receive their advertisements. According to an exemplary embodiment, a method for providing media content via a system includes steps of detecting a number of user devices logged onto the system, and providing the media content to the user devices responsive to the detected number.
    Type: Application
    Filed: April 21, 2005
    Publication date: March 19, 2009
    Inventors: Louis Robert Litwin, Purvin Bibhas Pandit, Donald Lee Hornback
  • Patent number: RE44597
    Abstract: A system and method for supporting updates of database contact information to mobile communications devices includes a system having a data entry computer for compiling database contact information for a group of mobile communications devices, a service provider computer server in signal communication with the data entry computer for uploading the database contact information into the service provider computer server and for downloading the database contact information substantially simultaneously to the group of mobile communications devices, and a mobile communications device in signal communication with the service provider computer server for receiving the database contact information and for updating its own global logical database; wherein the method for supporting updates of database contact information to mobile communications devices includes the steps of compiling database contact information for a group of mobile communications devices, uploading the database contact information to a service provid
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: November 12, 2013
    Assignee: Thomson Licensing
    Inventor: Louis Robert Litwin