Patents by Inventor Carl-Erik W. Sundberg

Carl-Erik W. Sundberg 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: 9048977
    Abstract: A system, a method and an apparatus are disclosed herein for receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO transmission. In one embodiment, the system comprises a transmitter that is able to be directed to transmit wireless signals over a multiple-input, multiple output (MIMO) system using any of a plurality of encoding modes; and a user terminal having a receiver comprising a decoding module which has a plurality of decoding modes, each of which can be used to decode communications from the transmitter received over a multiple-input, multiple output (MIMO) channel, wherein at least one encoding mode is operable with multiple of the decoding modes.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: June 2, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Sean A. Ramprashad, Haralabos C. Papadopoulos, Giuseppe Caire, Carl-Erik W. Sundberg
  • Patent number: 8861356
    Abstract: A method and apparatus is disclosed herein for information delivery with network coding over time-varying network topologies. In one embodiment, the method comprises decomposing a sequence of topology graphs that model a time-varying network topology into a plurality of virtual graphs, where each virtual graph of the plurality of virtual graphs corresponds to a distinct traffic class, and the virtual topology graph representing a partial topology of a time-varying network.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 14, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Ulas C. Kozat, Christine P├ępin, Haralabos Papadopoulos, Sean A. Ramprashad, Carl-Erik W. Sundberg
  • Patent number: 8565329
    Abstract: A method and apparatus is disclosed herein for a modified soft output M-algorithm.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: October 22, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Patent number: 8451951
    Abstract: A method, apparatus and system are disclosed herein for channel classification and adaptation.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: May 28, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Giuseppe Caire, Carl-Erik W. Sundberg, Haralabos Papadopoulos, Sean A. Ramprashad
  • Patent number: 8325840
    Abstract: A method and apparatus for tree position adaptive SOMA receiver structures are disclosed herein. In one embodiment, a device for use in a wireless communication system comprises a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modulation, where the receiver includes an inner decoder structure having a soft output M-algorithm (SOMA) based multiple-in multiple-out (MIMO) joint demapper that uses a SOMA-based MIMO detection process to perform joint inner demapping over each tone, and wherein the SOMA-based MIMO joint demapper is operable to search a detection tree for each tone using a tree-search symbol order that is adapted for each tone based on channel state information and extrinsic information from the outer decoder, where only a number of best alternatives from every level of the tree are expanded.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: December 4, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Ozgun Bursalioglu, Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Patent number: 8279954
    Abstract: A method and apparatus is disclosed herein for forward-backward SOMA techniques. In one embodiment, the apparatus is a receiver comprising: an inner decoder structure having a soft output M-algorithm (SOMA) based multiple-in multiple-out (MIMO) joint demapper that uses a SOMA-based MIMO detection process to perform joint inner demapping over each tone, where the SOMA-based MIMO joint demapper is operable to identify a best candidate among a number of candidates by searching a detection tree for each tone using a forward pass through the detection tree, where only a number of best alternatives from every level of the tree are expanded and where soft-output related information is collected and stored, and to perform a second pass, following the forward pass, during which soft-output is computed for each bit; and an outer decoder operable with the SOMA-based inner decoder to perform iterative decoding.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: October 2, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Patent number: 8064548
    Abstract: A method and apparatus is disclosed herein for adaptive MaclogMAP-type receiver structures. In one embodiment, a device comprises a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modulation, and the receiver comprises an inner decoder structure having a multiple-in multiple-out (MIMO) joint demapper to perform most likely transmitted symbol estimation using a modified MaxLogMAP process that is operable to adapt a degree of metric correction based on quality of OFDM tones.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: November 22, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventors: Carl-Erik W. Sundberg, Haralabos Papadopoulos
  • Patent number: 8059732
    Abstract: A method, apparatus and system are disclosed herein for wireless transmission from multiple non-collocated base stations. In one embodiment, the system comprises one or more terminals; and at least two base stations wirelessly communicating information-bearing signals from a set of antenna elements dispersed over multiple, non-collocated base stations to the one or more terminals using coding systems.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: November 15, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Publication number: 20110110449
    Abstract: A system, a method and an apparatus are disclosed herein for receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO transmission. In one embodiment, the system comprises a transmitter that is able to be directed to transmit wireless signals over a multiple-input, multiple output (MIMO) system using any of a plurality of encoding modes; and a user terminal having a receiver comprising a decoding module which has a plurality of decoding modes, each of which can be used to decode communications from the transmitter received over a multiple-input, multiple output (MIMO) channel, wherein at least one encoding mode is operable with multiple of the decoding modes.
    Type: Application
    Filed: May 3, 2010
    Publication date: May 12, 2011
    Inventors: Sean A. Ramprashad, Haralabos C. Papadopoulos, Giuseppe Caire, Carl-Erik W. Sundberg
  • Publication number: 20100040163
    Abstract: A method, apparatus and system are disclosed herein for channel classification and adaptation.
    Type: Application
    Filed: August 10, 2009
    Publication date: February 18, 2010
    Inventors: Giuseppe Caire, Carl-Erik W. Sundberg, Haralabos Papadopoulos, Sean A. Ramprashad
  • Publication number: 20090296842
    Abstract: A method and apparatus is disclosed herein for a modified soft output M-algorithm.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 3, 2009
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Publication number: 20090285323
    Abstract: A method and apparatus is disclosed herein for adaptive soft output M-algorithm receiver structures. In one embodiment, a device for use in a wireless communication system includes a transmitter, and comprises of a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modulation, where the receiver comprises an inner decoder structure having a soft output M-algorithm (SOMA) based multiple-in multiple-out (MIMO) joint demapper that uses a SOMA-based MIMO detection process to perform joint inner demapping over each subtone.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Inventors: Carl-Erik W. Sundberg, Haralabos Papadopoulos
  • Publication number: 20090225878
    Abstract: A method and apparatus is disclosed herein for forward-backward SOMA techniques. In one embodiment, the apparatus is a receiver comprising: an inner decoder structure having a soft output M-algorithm (SOMA) based multiple-in multiple-out (MIMO) joint demapper that uses a SOMA-based MIMO detection process to perform joint inner demapping over each tone, where the SOMA-based MIMO joint demapper is operable to identify a best candidate among a number of candidates by searching a detection tree for each tone using a forward pass through the detection tree, where only a number of best alternatives from every level of the tree are expanded and where soft-output related information is collected and stored, and to perform a second pass, following the forward pass, during which soft-output is computed for each bit; and an outer decoder operable with the SOMA-based inner decoder to perform iterative decoding.
    Type: Application
    Filed: December 15, 2008
    Publication date: September 10, 2009
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Publication number: 20090220034
    Abstract: A method and apparatus is disclosed herein for receiving a layered transmission of data in a wireless communication system using an iterative layered receiver structure.
    Type: Application
    Filed: December 15, 2008
    Publication date: September 3, 2009
    Inventors: Sean A. Ramprashad, Carl-Erik W. Sundberg
  • Publication number: 20090213954
    Abstract: A method and apparatus for tree position adaptive SOMA receiver structures are disclosed herein. In one embodiment, a device for use in a wireless communication system comprises a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modulation, where the receiver includes an inner decoder structure having a soft output M-algorithm (SOMA) based multiple-in multiple-out (MIMO) joint demapper that uses a SOMA-based MIMO detection process to perform joint inner demapping over each tone, and wherein the SOMA-based MIMO joint demapper is operable to search a detection tree for each tone using a tree-search symbol order that is adapted for each tone based on channel state information and extrinsic information from the outer decoder, where only a number of best alternatives from every level of the tree are expanded.
    Type: Application
    Filed: December 15, 2008
    Publication date: August 27, 2009
    Inventors: Ozgun Bursalioglu, Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Publication number: 20090075686
    Abstract: A method, apparatus and system is disclosed herein for wireless transmission based on MU-MIMO and two-way training.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Inventors: Krishna S. Gomadam, Haralabos Papadopoulos, Carl-Erik W. Sundberg
  • Publication number: 20080304590
    Abstract: A method and apparatus is disclosed herein for wireless transmission from multiple non-colocated antennas. In one embodiment, a wireless communication system comprises a controller to control a set of antenna elements dispersed over multiple, non-collocated base stations to wirelessly transmit information-bearing signals to one or more receivers using OFDM transmission, wherein control unit includes an antenna selection control operable to select non-collocated antenna elements from the set of antenna elements to send at least one signal to a receiver in the wireless communication system from antenna elements located at different base stations, and further wherein the OFDM transmission uses a circular prefix long enough to accommodate a maximum possible relative delay in reception between arrivals of the transmitted signals.
    Type: Application
    Filed: May 30, 2008
    Publication date: December 11, 2008
    Inventors: Carl-Erik W. Sundberg, Haralabos Papadopoulos
  • Publication number: 20080285671
    Abstract: A method and apparatus is disclosed herein for adaptive MaclogMAP-type receiver structures. In one embodiment, a device comprises a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modulation, and the receiver comprises an inner decoder structure having a multiple-in multiple-out (MIMO) joint demapper to perform most likely transmitted symbol estimation using a modified MaxLogMAP process that is operable to adapt a degree of metric correction based on quality of OFDM tones.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 20, 2008
    Inventors: Carl-Erik W. Sundberg, Haralabos Papadopoulos
  • Publication number: 20080225751
    Abstract: A method and apparatus is disclosed herein for information delivery with network coding over time-varying network topologies. In one embodiment, the method comprises decomposing a sequence of topology graphs that model a time-varying network topology into a plurality of virtual graphs, where each virtual graph of the plurality of virtual graphs corresponds to a distinct traffic class, and the virtual topology graph representing a partial topology of a time-varying network.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 18, 2008
    Inventors: Ulas C. Kozat, Christine Pepin, Haralabos Papadopoulos, Sean A. Ramprashad, Carl-Erik W. Sundberg
  • Publication number: 20080130769
    Abstract: A method, apparatus and system are disclosed herein for wireless transmission from multiple non-collocated base stations. In one embodiment, the system comprises one or more terminals; and at least two base stations wirelessly communicating information-bearing signals from a set of antenna elements dispersed over multiple, non-collocated base stations to the one or more terminals using coding systems.
    Type: Application
    Filed: November 13, 2007
    Publication date: June 5, 2008
    Inventors: Haralabos Papadopoulos, Carl-Erik W. Sundberg