Patents by Inventor Hidenori Akita
Hidenori Akita 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).
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Patent number: 8913544Abstract: In a communication control apparatus wirelessly communicable with a plurality of wireless communication units respectively installed in a plurality of vehicles, a first determiner determines at least one wireless communication unit in a number of wireless communication units in the plurality of wireless communication units as a first enabling unit that enables wireless communications with the communication control apparatus if information transmitted from the at least one wireless communication unit is second type information including a piece of vehicle information that includes at least the identifier of the corresponding vehicle. A second determiner determines a wireless communication unit in the remaining one or more wireless communication units as a second enabling unit, which enables wireless communications with the communication control apparatus, if information transmitted from the wireless communication unit is not included in the information transmitted from the first enabling unit.Type: GrantFiled: August 8, 2012Date of Patent: December 16, 2014Assignee: DENSO CORPORATIONInventors: Hidenori Akita, Toshiya Saito
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Publication number: 20140269604Abstract: An inter-vehicle communication device that is connected to a wide-area communication terminal determines a dedicated short-range communication resource assignment by using a wide-area communication resource assignment that is assigned to the wide-area communication terminal. Since a plurality of terminals are not assigned to the same resource block in the wide-area communication resource assignment, the dedicated short-range communication resource assignment determined by using the wide-area wireless communication resource assignment can also prevent a plurality of terminals from being assigned to the same time slot. The wide-area communication resource assignment is essentially necessary for the communication between a base station communication device and the terminals. Since the wide-area communication resource assignment which is necessary is used to determine the dedicated short-range communication resource assignment, a limit to the amount of downlink data can be reduced.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventors: Yuuji KAMIYA, Hidenori AKITA, Toshiya SAITO
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Patent number: 8780690Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted including a plurality of sequence elements interleaved in time and frequency. The synchronization channel signal sequence elements enable an initial acquisition and cell search method with low computational load by providing predetermined time domain symmetry for common sequence elements in OFDMA symbol periods for OFDMA symbol timing detection and frequency error detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: GrantFiled: January 13, 2012Date of Patent: July 15, 2014Assignee: Motorola Mobility LLCInventors: Hidenori Akita, Masaya Fukuta, Hiroshi Hayashi, Kevin L. Baum, Brian K. Classon, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Patent number: 8767525Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: GrantFiled: July 15, 2011Date of Patent: July 1, 2014Assignee: Motorola Mobility LLCInventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Massaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20130294343Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: ApplicationFiled: July 5, 2013Publication date: November 7, 2013Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Massaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20130039357Abstract: In a communication control apparatus wirelessly communicable with a plurality of wireless communication units respectively installed in a plurality of vehicles, a first determiner determines at least one wireless communication unit in a number of wireless communication units in the plurality of wireless communication units as a first enabling unit that enables wireless communications with the communication control apparatus if information transmitted from the at least one wireless communication unit is second type information including a piece of vehicle information that includes at least the identifier of the corresponding vehicle. A second determiner determines a wireless communication unit in the remaining one or more wireless communication units as a second enabling unit, which enables wireless communications with the communication control apparatus, if information transmitted from the wireless communication unit is not included in the information transmitted from the first enabling unit.Type: ApplicationFiled: August 8, 2012Publication date: February 14, 2013Applicant: Denso CorporationInventors: Hidenori AKITA, Toshiya Saito
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Patent number: 8374452Abstract: The GCL sequence index of each cell/sector is assigned so that a difference of the indices between adjacent cells/sectors is more than N, where N?1. During GCL index detection, the adjacent N?1 indices of an index with the largest magnitude can be deleted from handoff candidate cell indices.Type: GrantFiled: April 7, 2011Date of Patent: February 12, 2013Assignee: Motorola Mobility LLCInventors: Hidenori Akita, Masaya Fukuta, Hiroshi Hayashi
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Patent number: 8320360Abstract: A method and apparatus for transmitting a primary and secondary synchronization channel is provided herein. During operation a transmitter will transmit a primary synchronization channel (P-SCH) in a subframe and a secondary synchronization channel (S-SCH) in the subframe. The S-SCH is modulated by a complex exponential wave and scrambled with a scrambling code. In certain embodiments of the present invention the P-SCH comprises a GCL sequence or a Zadoff-Chu sequence and the scrambling code is based on the GCL sequence index of the P-SCH.Type: GrantFiled: December 5, 2006Date of Patent: November 27, 2012Assignee: Motorola Mobility LLCInventors: Masaya Fukuta, Hidenori Akita
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Patent number: 8254344Abstract: A method and apparatus for fast cell search based on a chirp reference signal transmission is disclosed herein. A primary synchronization channel (P-SCH) and two secondary synchronization channels (S-SCH1 and S-SCH2) will be utilized. S-SCH1 will comprise a reference sequence having a first index value and S-SCH2 will comprise a reference sequence having a second index value. S-SCH1 and S-SCH2 will be scrambled with a first and a second scrambling code, respectively. The second scrambling code will be based on the first index value.Type: GrantFiled: April 19, 2011Date of Patent: August 28, 2012Assignee: Motorola Mobility LLCInventors: Hidenori Akita, Masaya Fukuta
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Publication number: 20120113927Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted including a plurality of sequence elements interleaved in time and frequency. The synchronization channel signal sequence elements enable an initial acquisition and cell search method with low computational load by providing predetermined time domain symmetry for common sequence elements in OFDMA symbol periods for OFDMA symbol timing detection and frequency error detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: ApplicationFiled: January 13, 2012Publication date: May 10, 2012Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Masaya Fukuta, Hiroshi Hayashi, Kevin L. Baum, Brian K. Classon, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20110268079Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwiths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: ApplicationFiled: July 15, 2011Publication date: November 3, 2011Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20110268104Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: ApplicationFiled: July 15, 2011Publication date: November 3, 2011Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20110211542Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted including a plurality of sequence elements interleaved in time and frequency. The synchronization channel signal sequence elements enable an initial acquisition and cell search method with low computational load by providing predetermined time domain symmetry for common sequence elements in OFDMA symbol periods for OFDMA symbol timing detection and frequency error detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: ApplicationFiled: March 21, 2011Publication date: September 1, 2011Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Publication number: 20110194401Abstract: A method and apparatus for fast cell search based on a chirp reference signal transmission is disclosed herein. A primary synchronization channel (P-SCH) and two secondary synchronization channels (S-SCH1 and S-SCH2) will be utilized. S-SCH1 will comprise a reference sequence having a first index value and S-SCH2 will comprise a reference sequence having a second index value. S-SCH1 and S-SCH2 will be scrambled with a first and a second scrambling code, respectively. The second scrambling code will be based on the first index value.Type: ApplicationFiled: April 19, 2011Publication date: August 11, 2011Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Masaya Fukuta
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Publication number: 20110182264Abstract: The GCL sequence index of each cell/sector is assigned so that a difference of the indices between adjacent cells/sectors is more than N, where N?1. During GCL index detection, the adjacent N?1 indices of an index with the largest magnitude can be deleted from handoff candidate cell indices.Type: ApplicationFiled: April 7, 2011Publication date: July 28, 2011Applicant: MOTOROLA MOBILITY, INC.Inventors: Hidenori Akita, Masaya Fukuta, Hiroshi Hayashi
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Patent number: 7983143Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal (818), the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth (816) and including information for providing at least partial cell identification information (812). The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection (1112) and frame boundary detection and cell specific information detection (1114) in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: GrantFiled: February 8, 2006Date of Patent: July 19, 2011Assignee: Motorola Mobility, Inc.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Patent number: 7965689Abstract: A method and apparatus for fast cell search based on a chirp reference signal transmission is disclosed herein. A primary synchronization channel (P-SCH) and two secondary synchronization channels (S-SCH1 and S-SCH2) will be utilized. S- SCH1 will comprise a reference sequence having a first index value and S-SCH2 will comprise a reference sequence having a second index value. S-SCH1 and S- SCH2 will be scrambled with a first and a second scrambling code, respectively. The second scrambling code will be based on the first index value.Type: GrantFiled: May 14, 2007Date of Patent: June 21, 2011Assignee: Motorola Mobility, Inc.Inventors: Hidenori Akita, Masaya Fukuta
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Patent number: 7911935Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted including a plurality of sequence elements interleaved in time and frequency (610, 640). The synchronization channel signal sequence elements enable an initial acquisition and cell search method with low computational load by providing predetermined time domain symmetry (702, 704) for common sequence elements in OFDMA symbol periods (620, 660) for OFDMA symbol timing detection and frequency error detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: GrantFiled: February 8, 2006Date of Patent: March 22, 2011Assignee: Motorola Mobility, Inc.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Patent number: 7706249Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal (818), the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth (816). The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection by differential processing of sequence elements of the synchronization channel signal (1112) and frame boundary detection and cell specific information detection (1114) in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.Type: GrantFiled: February 8, 2006Date of Patent: April 27, 2010Assignee: Motorola, Inc.Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Masaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
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Patent number: 7697498Abstract: To provide high-quality communication even when the power for synchronization preamble is reduced in an OFDM communication device. To achieve symbol synchronization, an OFDM communication device obtains a zero amplitude reduced preamble signal by passing a specified synchronization preamble through an ideal low-pass filter to reduce a signal component near zero amplitude within a time domain, and time-multiplexes the obtained zero amplitude reduced preamble signal with transmit data to generate an OFDM transmit signal. A receiver section of the OFDM communication device determines the cross correlation between a receive signal and a specified synchronization preamble, which is patterned the same as the counterpart in a transmitter section of the OFDM communication device, and detects a synchronization position in accordance with the determined cross correlation.Type: GrantFiled: January 30, 2004Date of Patent: April 13, 2010Assignee: Motorola, Inc.Inventors: Hidenori Akita, Tetsu Ikeda