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公开(公告)号：USRE49244E1
公开(公告)日：2022-10-11
申请号：US16295722
申请日：2019-03-07
Inventor： Masayuki Orihashi , Yutaka Murakami , Katsuaki Abe , Akihiko Matsuoka
IPC: H04L9/12 , H04L9/08 , H04B1/7113 , H04K1/00 , H04W12/04 , H04B1/7115 , H04W12/77 , H04K1/10 , H04K1/08
Abstract: A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.
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公开(公告)号：US11444682B2
公开(公告)日：2022-09-13
申请号：US16968144
申请日：2019-01-30
Inventor： Yutaka Murakami
IPC: H04B7/15 , H04B7/0413 , H04W40/22 , H04W72/04
Abstract: This communication device relays a relay signal to be transmitted to and from a first communication device and a second communication device, and is connected to a first apparatus. The communication device transmits the relay signal using a first transmission slot, and also transmits, using a second transmission slot, a signal having been transmitted from the first apparatus, said signal being transmitted within the transmission period of the first transmission slot in a frequency domain different from that of the first transmission slot.
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公开(公告)号：US11387901B2
公开(公告)日：2022-07-12
申请号：US16608903
申请日：2018-06-08
Inventor： Yutaka Murakami
IPC: H04B10/116 , H04W4/40 , H04B10/114 , H04W64/00
Abstract: Useful data is transmitted to a terminal existing in a transportation vehicle. A communication apparatus installed in the transportation vehicle and configured to transmit the data to the terminal existing in the transportation vehicle includes a data selection unit and an illumination unit. The data selection unit acquires location information indicating a location of the transportation vehicle in which the terminal exists and which is traveling. Based on the acquired location information, the data selection unit selects approaching-location data related to a location ahead of a current location of the transportation vehicle in a traveling direction from a plurality of pieces of data related to the location. The illumination unit transmits, as a modulated light signal, a signal comprising the approaching-location data.
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公开(公告)号：US11350146B2
公开(公告)日：2022-05-31
申请号：US17160738
申请日：2021-01-28
Inventor： Yutaka Murakami , Tomohiro Kimura
IPC: H04N21/242 , H04H20/18 , H04N21/2381 , H04N21/462
Abstract: Provided is a method for transmitting a broadcasting content and a line content, the broadcasting content and the line content being synchronously displayed, the method including: generating a line parity packet from a plurality of line data packets in each of which the line content is stored; transmitting the line data packet and the line parity packet through a communication line; and transmitting a plurality of broadcasting data packets in each of which the broadcasting content is stored, from a base station using a broadcasting wave, a transfer clock time of the broadcasting content being delayed by a predetermined time compared with a transfer clock time of the line content. At this point, video quality can be improved when the real-time broadcasting program content and the real-time line content are simultaneously displayed.
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公开(公告)号：US11349603B2
公开(公告)日：2022-05-31
申请号：US16793763
申请日：2020-02-18
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
Abstract: A reception device includes: a receiver that receives a multiplexed signal; a first demapper that demaps the multiplexed signal, with a second modulated symbol stream of a second data series being included in the multiplexed signal as an undefined signal component, to generate a first bit likelihood stream of a first data series; a second demapper that demaps the multiplexed signal, with a first modulated symbol stream of the first data series being included in the multiplexed signal as an undefined signal component, to generate a second bit likelihood stream of the second data series; a first decoder that performs error control decoding on the first bit likelihood stream to derive the first data series; and a second decoder that performs error control decoding on the second bit likelihood stream to derive the second data series.
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Patent Agency Ranking
公开(公告)号：US11218198B2
公开(公告)日：2022-01-04
申请号：US16990669
申请日：2020-08-11
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04W72/04 , H04B7/0456 , H04L5/00 , G06F17/16
Abstract: A precoding process is performed on a first baseband signal and a second baseband signal to generate a first precoding signal and a second precoding signal. A pilot signal is inserted into the first precoding signal and phase change is performed on the second precoding signal. A pilot signal is inserted into the phase changed second precoding signal, and phase change is further performed on the phase-changed second precoding signal with the pilot signal inserted.
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公开(公告)号：US11139837B2
公开(公告)日：2021-10-05
申请号：US16872863
申请日：2020-05-12
Inventor： Yutaka Murakami
Abstract: A transmission apparatus includes a signal processing circuit configured to obtain information data bits to be transmitted; add known information data bits to the information data bits to generate first data blocks; perform error-correction coding on the first data blocks to generate first coded data blocks including parity data blocks such that the first coded data blocks satisfy a first code rate; remove the known information data bits from the first coded data blocks to generate second coded data blocks, the second coded data blocks satisfying a second code rate different from the first code rate; and modulate the second coded data blocks using a modulation scheme to generate a modulated signal, which is then transmitted. A number of the known information data bits depends on a number of the information data bits such that the first code rate is fixed regardless of the number of the information data bits.
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公开(公告)号：US11121817B2
公开(公告)日：2021-09-14
申请号：US16726338
申请日：2019-12-24
Inventor： Yutaka Murakami
Abstract: Provided is a transmission method executed by a transmitting apparatus to transmit a content to a plurality of terminals. The content having transmission count information indicating a number of times the content is to be transmitted by the transmitting apparatus. The transmission method including a first transmission step of generating and transmitting a first transmission signal which transfers at least a first portion of a plurality of data packets including a plurality of content packets, storing data of the content therein, and a plurality of parity packets, generated from the content packets, and a second transmission step of, when the transmission count information of the content indicates a plurality of times, generating a second transmission signal including at least a second portion of the plurality of data packets, and transmitting the second transmission signal during a period which differs from a period during which the first transmission signal is transmitted.
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公开(公告)号：US11115101B2
公开(公告)日：2021-09-07
申请号：US16887552
申请日：2020-05-29
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
Abstract: An indicator in a master AP from among a plurality of APs obtains communication quality of communication with an AP which is a communication partner. In the case where the obtained communication quality is less than a threshold, the indicator causes the plurality of APs including the master AP to perform cooperative operation to transmit data. In the case where the obtained communication quality is not less than the threshold, the indicator causes the plurality of APs including the master AP to stop the cooperative operation.
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公开(公告)号：US11038560B2
公开(公告)日：2021-06-15
申请号：US16746152
申请日：2020-01-17
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
IPC: H04B7/0413 , H04B1/16 , H04W4/06 , H04W16/26 , H04W16/28 , H04W76/40 , H04B7/0404 , H04B7/06 , H04B7/08 , H04N21/2365 , H04N21/426 , H04B7/10
Abstract: By a transmission method according to one aspect of the present disclosure, in a broadcasting system that generates a first broadcasting signal and a second broadcasting signal by performing multi-antenna encoding on program data, and wirelessly transmits a first broadcasting signal and a second broadcasting signal, a first transmit station transmits the first broadcasting signal, a second transmit station transmits the second broadcasting signal, the first transmit station and the second transmit station transmit the first broadcasting signal and the second broadcasting signal to an overlapping area at an identical time using an overlapping frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and arrangement of the first transmit station differs from arrangement of the second transmit station.
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