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公开(公告)号：US20240380933A1
公开(公告)日：2024-11-14
申请号：US18777907
申请日：2024-07-19
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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202.发明公开公开(公告)号：US20240340199A1
公开(公告)日：2024-10-10
申请号：US18745718
申请日：2024-06-17
Inventor： Yutaka MURAKAMI , Yasuaki YUDA
CPC classification number: H04L25/0224 , H04L5/0048 , H04L27/2657 , H04L27/2666
Abstract: A reception apparatus according to the present disclosure includes a receiver which, in operation, receives a downlink signal including a first data signal for the reception apparatus and first Reference Signals for Phase Tracking (PT-RS). The first data signal is mapped on a first set of subcarriers and the first PT-RS is mapped to the downlink signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal. The reception apparatus according also includes a circuit which, in operation, estimates a phase noise using the first PT-RS included in the downlink signal.
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公开(公告)号：US20240275521A1
公开(公告)日：2024-08-15
申请号：US18635266
申请日：2024-04-15
Inventor： Yutaka MURAKAMI
CPC classification number: H04L1/0083 , H04W28/06 , H04W52/0229 , H04W52/0235 , H04W52/028 , H04W88/06
Abstract: A transmission device includes a generator that generates a frame in a predetermined frame format and a communicator that transmits the frame generated by the generator. The predetermined frame format includes a first field indicating whether information related to a wake-up process performed by a device that received a frame in the predetermined frame format is valid or not. When the first field indicates that the information is valid, the predetermined frame format further includes a second field indicating identification information identifying the device.
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公开(公告)号：US20240178953A1
公开(公告)日：2024-05-30
申请号：US18537114
申请日：2023-12-12
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI , Hiroyuki MOTOZUKA
IPC: H04L5/00 , H04B7/0408 , H04B7/0456 , H04B17/318 , H04L27/04 , H04L27/26
CPC classification number: H04L5/0023 , H04B7/0408 , H04B7/0456 , H04B17/318 , H04L5/0007 , H04L5/0048 , H04L27/04 , H04L27/2601 , H04L27/26362 , H04L27/2636
Abstract: A transmission device that improves data reception quality 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. Δλ satisfies π/2 radians
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公开(公告)号：US20240113810A1
公开(公告)日：2024-04-04
申请号：US18532791
申请日：2023-12-07
Inventor： Yutaka MURAKAMI , Shutai OKAMURA , Kiyotaka KOBAYASHI , Masayuki ORIHASHI , Kazuaki TAKAHASHI
CPC classification number: H04L1/0071 , H03M13/15 , H04L1/0003 , H04L1/0009 , H04L1/0059 , H04L1/22 , H04L5/0007 , H04L27/0008 , H04L27/36 , H04L27/38 , H04L27/2647
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.
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Patent Agency Ranking
公开(公告)号：US20240080047A1
公开(公告)日：2024-03-07
申请号：US18501757
申请日：2023-11-03
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
CPC classification number: H03M13/116 , H03M13/1125 , H03M13/15 , H03M13/616 , H03M13/6362 , H03M13/6527 , H04L1/0041
Abstract: Disclosed are an encoder, a transmission device, and an encoding method with which the transmission amount is reduced and a deterioration in transmission efficiency is suppressed while improving reception quality when QC-LDPC or a like block encoding is used. A puncture pattern setting unit (620) searches for a puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of a sub block matrix that forms a check matrix (H) of a QC-LDPC code, and a puncture unit (data reduction unit) (630) switches the puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of the sub block matrix that forms the check matrix of the QC-LDPC code.
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公开(公告)号：US20230412248A1
公开(公告)日：2023-12-21
申请号：US18238707
申请日：2023-08-28
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
Abstract: In a repeater device: a communication device receives position information of a forwarding source device and a forwarding destination device using a first communication scheme; based on the position information of the forwarding source device, a moving mechanism moves the repeater device to a position at which it is capable of communicating with the forwarding source device using a second communication scheme; the communication device receives data from the forwarding source device using the second communication scheme; a storage device stores the data; based on the position information of the forwarding destination device received by the communication device, the moving mechanism moves the repeater device to a position at which it is capable of communicating with the forwarding destination device using the second communication scheme, and the communication device transmits the data stored in the storage device to the forwarding destination device using the second communication scheme.
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208.发明公开公开(公告)号：US20230362036A1
公开(公告)日：2023-11-09
申请号：US18354418
申请日：2023-07-18
Inventor： Yutaka MURAKAMI , Yasuaki YUDA
CPC classification number: H04L25/0224 , H04L5/0048 , H04L27/2657 , H04L27/2666
Abstract: A reception apparatus according to the present disclosure includes a receiver which, in operation, receives a downlink signal including a first data signal for the reception apparatus and first Reference Signals for Phase Tracking (PT-RS). The first data signal is mapped on a first set of subcarriers and the first PT-RS is mapped to the downlink signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal. The reception apparatus according also includes a circuit which, in operation, estimates a phase noise using the first PT-RS included in the downlink signal.
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公开(公告)号：US20230344475A1
公开(公告)日：2023-10-26
申请号：US18343620
申请日：2023-06-28
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/0456 , H04B7/0452 , H04B7/06 , H04B7/0413
CPC classification number: H04B7/0456 , H04B7/0452 , H04B7/0628 , H04B7/0671 , H04B7/0413
Abstract: Provided are M signal processors that respectively generate modulated signals for M reception apparatuses (where M is an integer equal to 2 or greater), a multiplexing signal processor, and N antenna sections (where N is an integer equal to 1 or greater). When transmitting multiple streams, each of the M signal processors generates two mapped signals, generates first and second precoded signals by precoding the two mapped signals, periodically changes the phase of signal points in the IQ plane with respect to the second precoded signal, outputs the phase-changed signal, and outputs the first precoded signal and the phase-changed second precoded signal as two modulated signals. When transmitting a single stream, each of the M signal processor outputs a single modulated signal. The multiplexing signal processor multiplexes the modulated signals output from the M signal processors, and generates N multiplexed signals. The N antenna sections respectively transmit the N multiplexed signals.
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210.发明公开公开(公告)号：US20230261821A1
公开(公告)日：2023-08-17
申请号：US18003091
申请日：2021-06-29
Inventor： Yutaka MURAKAMI
IPC: H04L5/00
CPC classification number: H04L5/0048 , H04L5/0007 , H04L5/006
Abstract: This wireless communication system comprises: a first wireless communication device that transmits a plurality of first reference signals having controlled directivity by the orthogonal frequency division multiple access (OFDMA) method in a first period; and a second wireless communication device that transmits a plurality of second reference signals having controlled directivity to the first wireless communication device in a second period, the second reference signals including information relating to directivity and corresponding any one or more of the first reference signals received from the first wireless communication device.
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