公开(公告)号：US20200007258A1

公开(公告)日：2020-01-02

申请号：US16508575

申请日：2019-07-11

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04J11/00 ,  H04B7/0456 ,  H04B7/06 ,  H04L25/02 ,  H04B7/10

Abstract: A first transmission signal z1(t) and a second transmission signal z2(t) are generated from a first modulated signal s1(t) and a second modulated signal s2(t) by using a precoding matrix, and parameters of the precoding matrix are calculated from feedback information.

公开(公告)号：US20190334550A1

公开(公告)日：2019-10-31

申请号：US16403758

申请日：2019-05-06

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Yutaka MURAKAMI

IPC: H03M13/11 ,  H04L1/00 ,  H03M13/15 ,  H03M13/13

Abstract: An encoding method and encoder of a time-varying LDPC-CC with high error correction performance are provided. In an encoding method of performing low density parity check convolutional coding (LDPC-CC) of a time varying period of q using a parity check polynomial of a coding rate of (n−1)/n (where n is an integer equal to or greater than 2), the time varying period of q is a prime number greater than 3, the method receiving an information sequence as input and encoding the information sequence using Equation 1 as a g-th (g=0, 1, . . . , q−1) parity check polynomial to satisfy 0.

公开(公告)号：US20190296950A1

公开(公告)日：2019-09-26

申请号：US16436091

申请日：2019-06-10

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI ,  Hiroyuki MOTOZUKA

IPC: H04L27/26 ,  H04L5/00

Abstract: A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a 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 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

公开(公告)号：US20190044772A1

公开(公告)日：2019-02-07

申请号：US16155016

申请日：2018-10-09

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04L27/26 ,  H04B7/06 ,  H04L27/36 ,  H04L27/34 ,  H04B7/0413 ,  H04B7/08 ,  H04L27/38 ,  H04L1/00

CPC classification number: H04L27/2604 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0682 ,  H04B7/0697 ,  H04B7/08 ,  H04L1/005 ,  H04L1/0071 ,  H04L27/3405 ,  H04L27/3416 ,  H04L27/36 ,  H04L27/38

Abstract: A transmission method includes mapping processing, phase change processing, and transmission processing. In the mapping processing, a plurality of first modulation signals and a plurality of second modulation signals are generated using a first mapping scheme, and a plurality of third modulation signals and a plurality of fourth modulation signals are generated using a second mapping scheme. In the phase change processing, a phase change is performed on the plurality of second modulation signals and the plurality of fourth modulation signals using all N kinds of phases. In the transmission processing, the first modulation signals and the second modulation signals are respectively transmitted at a same frequency and a same time from different antennas, and the third modulation signals and the fourth modulation signals are respectively transmitted at a same frequency and a same time from the different antennas.

公开(公告)号：US20190007105A1

公开(公告)日：2019-01-03

申请号：US16102078

申请日：2018-08-13

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Tomohiro KIMURA ,  Yutaka MURAKAMI ,  Mikihiro OUCHI

IPC: H04B7/0413 ,  H04W76/40 ,  H04N21/426 ,  H04N21/2365 ,  H04B7/0404 ,  H04B7/06 ,  H04W16/28 ,  H04W16/26 ,  H04W4/06 ,  H04B1/16

CPC classification number: H04B7/0413 ,  H04B1/16 ,  H04B7/0404 ,  H04B7/0697 ,  H04B7/0874 ,  H04B7/10 ,  H04N21/2365 ,  H04N21/42615 ,  H04N21/4263 ,  H04W4/06 ,  H04W16/26 ,  H04W16/28 ,  H04W76/40

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：US20180359016A1

公开(公告)日：2018-12-13

申请号：US15738426

申请日：2016-06-15

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/06 ,  H04B17/309 ,  H04W76/34 ,  H04W76/15 ,  H04W72/04

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.

公开(公告)号：US20180248730A1

公开(公告)日：2018-08-30

申请号：US15963438

申请日：2018-04-26

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04L27/26 ,  H04B7/06

CPC classification number: H04L27/2604 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0682 ,  H04B7/0697 ,  H04B7/08 ,  H04L1/005 ,  H04L1/0071 ,  H04L27/3405 ,  H04L27/3416 ,  H04L27/36 ,  H04L27/38

Abstract: A transmission method includes mapping processing, phase change processing, and transmission processing. In the mapping processing, a plurality of first modulation signals and a plurality of second modulation signals are generated using a first mapping scheme, and a plurality of third modulation signals and a plurality of fourth modulation signals are generated using a second mapping scheme. In the phase change processing, a phase change is performed on the plurality of second modulation signals and the plurality of fourth modulation signals using all N kinds of phases. In the transmission processing, the first modulation signals and the second modulation signals are respectively transmitted at a same frequency and a same time from different antennas, and the third modulation signals and the fourth modulation signals are respectively transmitted at a same frequency and a same time from the different antennas.

公开(公告)号：US20180167154A1

公开(公告)日：2018-06-14

申请号：US15579685

申请日：2016-06-01

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04J11/00 ,  H04L25/02

CPC classification number: H04J11/0023 ,  H04B1/02 ,  H04B1/06 ,  H04B7/0456 ,  H04B7/063 ,  H04B7/10 ,  H04J11/00 ,  H04L25/02

Abstract: A first transmission signal and a second transmission signal are generated from a first modulated signal and a second modulated signal by using a precoding matrix, and parameters of the precoding matrix are calculated from feedback information.

公开(公告)号：US20160173307A1

公开(公告)日：2016-06-16

申请号：US15044432

申请日：2016-02-16

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04L27/26 ,  H04B7/04 ,  H04L1/00 ,  H04L5/00

CPC classification number: H04L27/265 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0643 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/03942 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/3405 ,  H04L2001/0093

Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

公开(公告)号：US20160142118A1

公开(公告)日：2016-05-19

申请号：US15003419

申请日：2016-01-21

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/04 ,  H04L27/26

CPC classification number: H04B7/0456 ,  G06F11/10 ,  H04B7/0413 ,  H04B7/0482 ,  H04B7/0669 ,  H04B7/0682 ,  H04B7/0697 ,  H04L1/0058 ,  H04L5/005 ,  H04L25/0224 ,  H04L25/03898 ,  H04L25/067 ,  H04L27/2627 ,  H04L27/2649 ,  H04W72/044

Abstract: A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.