Patents by Inventor Mihai Horatiu Enescu

Mihai Horatiu Enescu 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: 9515709
    Abstract: Various communication network may benefit from precoding matrix smoothing. For example, a network node comprises a processor and a memory including computer program code. The memory and the computer program code, with the processor, are configured to cause the network node to receive a precoding matrix index indicating a precoding matrix, allocate resources for downlink transmission to a user equipment, smooth a plurality of precoding matrices including the precoding matrix across the allocated resources and transmit a signal indicating the plurality of precoding matrices have been smoothed. Based on the signal, the user equipment can perform interference reduction or cancellation.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: December 6, 2016
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Karol Schober, Mihai Horatiu Enescu
  • Patent number: 9363044
    Abstract: An arrangement is described for adapting outer loop precoder phase combiner in a radio communication system having coordinated multipoint transmission. In the arrangement ACK/NACK-message received as a response to a transmitted data packet is used for adapting the phase. When a NACK-message is received the phase may be adapted or it may be further determined if the error was due to error in channel code or due to destructive inter-point signal combining. If the error was due to destructive combining the phase is adjusted.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: June 7, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Karol Schober, Timo Eric Roman, Helka-Liina Maattanen, Mihai Horatiu Enescu
  • Publication number: 20150365145
    Abstract: Various communication network may benefit from precoding matrix smoothing. For example, a network node comprises a processor and a memory including computer program code. The memory and the computer program code, with the processor, are configured to cause the network node to receive a precoding matrix index indicating a precoding matrix, allocate resources for downlink transmission to a user equipment, smooth a plurality of precoding matrices including the precoding matrix across the allocated resources and transmit a signal indicating the plurality of precoding matrices have been smoothed. Based on the signal, the user equipment can perform interference reduction or cancellation.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventors: Karol Schober, Mihai Horatiu Enescu
  • Publication number: 20150173087
    Abstract: A method, apparatus and computer program product are provided to suppress interference, such as interference attributable to increased network density, interference attributable to interference between uplink and downlink transmissions in a TDD system and/or interference attributable to D2D communications. In the context of a method, it is determined whether communication between an access point and a mobile terminal or between a mobile terminal and another mobile terminal is to be subjected to real-valued modulation or complex-valued modulation such that the modulation and a dominant form of interference for the mobile terminal are either both real-valued or both complex-valued. The method also includes providing for communication with the mobile terminal in accordance with the one of real-valued modulation or complex-valued modulation that was determined.
    Type: Application
    Filed: May 30, 2013
    Publication date: June 18, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Karl Marko Juhani Lampinen, Tommi Koivisto, Mihai Horatiu Enescu, Timo Eric Roman, Maja Loncar, Lars Christensen, Soeren Skovgaard Christensen
  • Publication number: 20150016288
    Abstract: A user equipment (UE) provides feedback about channel conditions. From a set of primary sub-bands subject to channel state information reporting by the UE, there is identified one or more of the primary sub-bands for reporting channel quality with a finer frequency-domain granularity than other primary sub-bands of the set (202). The one or more is less than all primary sub-bands in the set. In various embodiments, either the UE or the network can select which are the primary sub-bands to be identified for the finer granularity reporting, and the selection can be for example the best primary sub-bands or those with the highest variance in a measure of channel quality or random (206). Then for each of the identified primary sub-bands, the UE measures and reports the channel quality with the finer frequency-domain granularity for each secondary sub-band whose frequency lay within the respective identified primary sub-band.
    Type: Application
    Filed: January 21, 2014
    Publication date: January 15, 2015
    Inventors: Helka-Liina MAATTANEN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Kari Paavo Kalevi PIETIKAINEN
  • Publication number: 20140301303
    Abstract: Measures including a method, comprising deriving at least one of one or more statistics of an interfering channel and a rate matching parameter of the interfering channel based on an interfering colocation information received from a serving transmission point device, wherein the interfering channel comprises a channel between an apparatus performing the method and an interfering transmission point device different from the serving transmission point device.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Broadcom Corporation
    Inventors: Timo Eric ROMAN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Tero Heikki Petteri KUOSMANEN
  • Publication number: 20140293914
    Abstract: A method and apparatus for distributed coordinated scheduling (virtual joint scheduling) is provided. A primary entity is selected and it performs joint scheduling decisions according to information received from one or more coordinating secondary entities. Information received from user equipments served by the primary entity may be taken into account. The primary entity then forwards information of its joint scheduling decisions or some outcome quantity to the one or more secondary entities, each of which may perform their own localized scheduling decisions based on the information provided by the primary entity.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 2, 2014
    Applicant: Broadcom Corporation
    Inventors: Helka-Liina MAATTANEN, Mihai Horatiu ENESCU, Tero Heikki Matti HENTTONEN
  • Patent number: 8811516
    Abstract: A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank?r precoder index corresponding to a rank?r precoder is determined, and performance for each rank?1 precoder within the rank?r precoder is measured Based on the measured performance, a rank?1 precoder that maximizes performance is selected.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 19, 2014
    Assignee: Nokia Corporation
    Inventors: Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Karol Schober
  • Publication number: 20140169565
    Abstract: Methods, apparatus and computer readable storage media are provided herein for scrambling code signalling in support of interference cancelling receivers. In some example embodiments, a method is provided that includes receiving scrambling code initialization parameters for at least one wanted codeword and for at least one interfering codeword from a base station. The method of this embodiment may also include detecting the at least one wanted codeword and the at least one interfering codeword in a transmission that is received from a base station. The method of this embodiment may also include decoding the at least one wanted codeword and the at least one interfering codeword. In some example embodiments, the decoded at least one interfering codeword is used in at least one of interference detection or interference cancellation.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Timo Eric ROMAN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Karl Marko Juhani LAMPINEN
  • Publication number: 20140153488
    Abstract: A network node includes, into a field of downlink control information that provides a user equipment with information for reception and decoding of data transmitted from the network node to the user equipment in a mobile communication network, an indication of receiver information. The receiver information is applicable for interference suppression/cancellation by a receiving operation of the user equipment, capable of performing interference suppression/cancellation using the receiver information. The user equipment detects the receiver information from the downlink control information, and can select a receiving operation using the receiver information.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Timo Eric ROMAN, Karl Marko Juhani LAMPINEN
  • Publication number: 20130308479
    Abstract: An arrangement is described for adapting outer loop precoder phase combiner in a radio communication system having coordinated multipoint transmission. In the arrangement ACK/NACK-message received as a response to a transmitted data packet is used for adapting the phase. When a NACK-message is received the phase may be adapted or it may be further determined if the error was due to error in channel code or due to destructive inter-point signal combining. If the error was due to destructive combining the phase is adjusted.
    Type: Application
    Filed: April 30, 2013
    Publication date: November 21, 2013
    Applicant: RENESAS MOBILE CORPORATION
    Inventors: Karol SCHOBER, Timo Eric ROMAN, Helka-Liina MAATTANEN, Mihai Horatiu ENESCU
  • Publication number: 20120201321
    Abstract: A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank?r precoder index corresponding to a rank?r precoder is determined, and performance for each rank?1 precoder within the rank?r precoder is measured Based on the measured performance, a rank?1 precoder that maximizes performance is selected
    Type: Application
    Filed: October 29, 2010
    Publication date: August 9, 2012
    Applicant: NOKIA CORPORATION
    Inventors: Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Karol Schober
  • Publication number: 20120113851
    Abstract: In an embodiment, state of a wireless channel on which information is received is measured; the measured state is used to select from a codebook a plurality of N codewords which optimize a predefined measure, and first and second codewords of the plurality are reported which best optimizes and next-best optimizes the predefined measure. If by example the above is done by a user equipment UE, in another embodiment the network receives first and second indications, searches a codebook using the first and second indications to find the first and second codewords; and utilizes them to improve the channel state information, such as by interpolating between them to find an estimate of the channel. In examples the channel is a MIMO channel that is estimated at two or more antenna ports, there are interpolation weights sent with the codeword indications, and the interpolating uses a geodesic algorithm.
    Type: Application
    Filed: April 22, 2010
    Publication date: May 10, 2012
    Applicant: NOKIA CORPORATION
    Inventors: Karol Schober, Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Timo Erkki Lunttila
  • Publication number: 20090316676
    Abstract: In accordance with an example embodiment of the present invention, an apparatus, comprising a processor configured to derive a time period; and a transmitter configured to transmit a first signal and a second signal to a network element, wherein the second signal is coupled to the first signal in a predetermined way within the time period, is disclosed.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 24, 2009
    Applicants: NOKIA CORPORATION, NOKIA SIEMENS NETWORKS OY
    Inventors: Troels Emil Kolding, Klaus Ingemann Pedersen, Timo Erkki Lunttila, Mihai Horatiu Enescu, Chun Yan Gao
  • Publication number: 20090046674
    Abstract: An approach is provided for transmitting channel feedback information. Bandwidth is partitioned into one or more resource groups corresponding to one or more resource units. One or more of the partitions is designated for transmission of a plurality of uplink pilots that specify channel information for the corresponding resource units.
    Type: Application
    Filed: August 17, 2007
    Publication date: February 19, 2009
    Inventors: Chun Yan Gao, Mihai Horatiu Enescu