-
公开(公告)号：US20250007576A1
公开(公告)日：2025-01-02
申请号：US18805950
申请日：2024-08-15
Inventor： Yutaka MURAKAMI , Hiroyuki MOTOZUKA
IPC: H04B7/0456 , H04B1/04 , H04L27/20
Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses F = ( e j θ 11 e j ( θ 11 + π 4 ) e j θ 21 e j ( θ 21 + π + π 4 ) ) on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.
-
公开(公告)号：US20240129003A1
公开(公告)日：2024-04-18
申请号：US18388965
申请日：2023-11-13
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI , Hiroyuki MOTOZUKA
IPC: H04B7/0456 , H04B7/0413 , H04B7/0417 , H04B7/06
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0417 , H04B7/0615
Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal; a first pilot inserter that inserts a pilot signal into the first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the phase-changed second precoded signal; and a phase changer that applies a phase change to the phase-changed and pilot-signal-inserted second precoded signal. Δλ satisfies π/2 radians
-
公开(公告)号：US20240007175A1
公开(公告)日：2024-01-04
申请号：US18470242
申请日：2023-09-19
Inventor： Yutaka MURAKAMI
IPC: H04B7/15 , H04B7/0413 , H04W40/22 , H04W72/0446
CPC classification number: H04B7/15 , H04B7/0413 , H04W40/22 , H04W72/0446
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.
-
154.发明公开公开(公告)号：US20230370196A1
公开(公告)日：2023-11-16
申请号：US18227527
申请日：2023-07-28
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L1/0068 , H03M13/1102 , H03M13/2906 , H03M13/616 , H03M13/6362 , H03M13/6516 , H04L1/0009 , H04L1/0041 , H04L1/0045 , H04L1/0057
Abstract: One coding method of a plurality of coding methods including at least a first coding method and a second coding method is selected, an information sequence is encoded by using the selected coding method, and an encoded sequence obtained by performing predetermined processing on the information sequence is modulated and transmitted. The first coding method is a coding method having a first coding rate, for generating a first encoded sequence by performing puncturing processing on a generated first codeword by using a first parity check matrix. The second coding method is a coding method having a second coding rate, for generating a second encoded sequence by performing puncturing processing on a generated second codeword by using a second parity check matrix that is different from the first parity check matrix, the second coding rate after the puncturing process being different from the first coding rate.
-
公开(公告)号：US20230308133A1
公开(公告)日：2023-09-28
申请号：US18143687
申请日：2023-06-16
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
IPC: H04B3/54 , H02J50/80 , H02J50/10 , B60L53/12 , B60L53/66 , B60L53/30 , H02J7/00 , H02J7/02 , H04L67/01
CPC classification number: H04B3/54 , B60L53/12 , B60L53/305 , B60L53/66 , H02J7/00032 , H02J7/0042 , H02J7/02 , H02J50/10 , H02J50/80 , H04L67/01
Abstract: A communication system includes one or more chargers and a server capable of communicating with the one or more chargers. The server obtains first information from a first vehicle via a first charger included in the one or more chargers, during charging of the first vehicle by the first charger, and supplies second information based on the first information to a second vehicle via a second charger included in the one or more chargers, during charging of the second vehicle by the second charger.
-
Patent Agency Ranking
公开(公告)号：US20230261793A1
公开(公告)日：2023-08-17
申请号：US18138232
申请日：2023-04-24
Inventor： Yutaka MURAKAMI
IPC: H04L1/08 , H04L1/00 , H04L1/1812 , H04L1/1825 , H04L1/1829 , H04L1/1867 , G06F11/10 , H04L1/1607
CPC classification number: H04L1/08 , H04L1/0041 , H04L1/0061 , H04L1/0068 , H04L1/0071 , H04L1/1819 , H04L1/1825 , H04L1/1845 , H04L1/1887 , G06F11/10 , H04L1/1607 , H04L1/0057 , H04L2001/0093 , H04L2001/0097
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.
-
公开(公告)号：US20230198583A1
公开(公告)日：2023-06-22
申请号：US18110543
申请日：2023-02-16
Inventor： Yutaka MURAKAMI , Hiroyuki MOTOZUKA
IPC: H04B7/0456 , H04B1/04 , H04L27/20
CPC classification number: H04B7/0456 , H04B1/0475 , H04L27/206
Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses
F
=
(
e
j
θ
11
e
j
(
θ
11
+
π
4
)
e
j
θ
21
e
j
(
θ
21
+
π
+
π
4
)
)
on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.-
公开(公告)号：US20230124557A1
公开(公告)日：2023-04-20
申请号：US18068464
申请日：2022-12-19
Inventor： Yutaka MURAKAMI , Shutai OKAMURA , Kiyotaka KOBAYASHI , Masayuki ORIHASHI , Kazuaki TAKAHASHI
Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
-
公开(公告)号：US20220393725A1
公开(公告)日：2022-12-08
申请号：US17875922
申请日：2022-07-28
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
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.
-
公开(公告)号：US20220271774A1
公开(公告)日：2022-08-25
申请号：US17744449
申请日：2022-05-13
Inventor： Yutaka MURAKAMI , Kiyotaka KOBAYASHI , Choo Eng YAP
Abstract: In a multi-antenna communication system using LDPC codes, a simple method is used to effectively improve the received quality by performing a retransmittal of less data without restricting applicable LDPC codes. In a case of a non-retransmittal, a multi-antenna transmitting apparatus (100) transmits, from two antennas (114A,114B), LDPC encoded data formed by LDPC encoding blocks (102A,102B). In a case of a retransmittal, the multi-antenna transmitting apparatus (100) uses a transmission method, in which the diversity gain is higher than in the previous transmission, to transmit only a part of the LDPC encoded data as previously transmitted. For example, the only the part of the LDPC encoded data to be re-transmitted is transmitted from the single antenna (114A).
-
-
-
-
-
-
-
-
-
Search Results
254
records
(took 0.028 seconds)
