Patents by Inventor Obioma Okehie

Obioma Okehie 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).

  • Receiver and receiving method for hierarchical modulation in single frequency networks
    Patent number: 10560300
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme. The receiver comprises an OFDM detector which includes an equaliser for recovering local service modulated sub-carriers of the second modulation scheme by generating an estimate of a combined channel ([Hn(z)+Hl(z)]) via which the first and second OFDM symbols have passed using the pilot sub-carrier symbols of the first and second OFDM symbols.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: February 11, 2020
    Assignee: SONY CORPORATION
    Inventors: Samuel Asangbeng Atungsiri, Matthew Paul Taylor, Obioma Okehie
  • RECEIVER AND RECEIVING METHOD FOR HIERARCHICAL MODULATION IN SINGLE FREQUENCY NETWORKS
    Publication number: 20190222459
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme. The receiver comprises an OFDM detector which includes an equalizer for recovering local service modulated sub-carriers of the second modulation scheme by generating an estimate of a combined channel ([Hn(z)+Hl(z)]) via which the first and second OFDM symbols have passed using the pilot sub-carrier symbols of the first and second OFDM symbols.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Applicant: SONY CORPORATION
    Inventors: Samuel Asangbeng ATUNGSIRI, Matthew Paul Taylor, Obioma Okehie
  • Receiver and receiving method for hierarchical modulation in single frequency networks
    Patent number: 10250425
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: April 2, 2019
    Assignee: SONY CORPORATION
    Inventors: Samuel Asangbeng Atungsiri, Matthew Paul Taylor, Obioma Okehie
  • RECEIVER AND RECEIVING METHOD FOR HIERARCHICAL MODULATION IN SINGLE FREQUENCY NETWORKS
    Publication number: 20170279651
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme.
    Type: Application
    Filed: April 6, 2017
    Publication date: September 28, 2017
    Applicant: SONY CORPORATION
    Inventors: Samuel Asangbeng ATUNGSIRI, Matthew Paul Taylor, Obioma Okehie
  • Receiver and receiving method for hierarchical modulation in single frequency networks
    Patent number: 9641376
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 2, 2017
    Assignee: Sony Corporation
    Inventors: Samuel Asangbeng Atungsiri, Matthew Paul Taylor, Obioma Okehie
  • RECEIVER AND RECEIVING METHOD FOR HIERARCHICAL MODULATION IN SINGLE FREQUENCY NETWORKS
    Publication number: 20150349998
    Abstract: A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols, the second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme, and the first OFDM symbols carry the national broadcast data symbols and the local service data symbols from a local insertion pipe and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Applicant: SONY CORPORATION
    Inventors: Samuel Asangbeng Atungsiri, Matthew Paul Taylor, Obioma Okehie