公开(公告)号：US20190207707A1

公开(公告)日：2019-07-04

申请号：US16297988

申请日：2019-03-11

申请人： Sun Patent Trust

发明人： Mikihiro OUCHI ,  Noritaka IGUCHI ,  Tomohiro KIMURA

IPC分类号： H04L1/00 ,  H04B7/0413 ,  H04B7/06 ,  H03M13/00

CPC分类号： H04L1/0041 ,  H03M13/6541 ,  H04B7/0413 ,  H04B7/068 ,  H04L1/0057

摘要： A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.

公开(公告)号：US20190132179A1

公开(公告)日：2019-05-02

申请号：US16233505

申请日：2018-12-27

申请人： Sun Patent Trust

发明人： Yoshinobu MATSUMURA ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04L27/26 ,  H04L5/00

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2649 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2698

摘要： An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≥2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount.

公开(公告)号：US20190068272A1

公开(公告)日：2019-02-28

申请号：US16163960

申请日：2018-10-18

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/06 ,  H04W52/42 ,  H04L25/03 ,  H04B7/08 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0426 ,  H04J11/00

摘要： A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation sheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

公开(公告)号：US20190052325A1

公开(公告)日：2019-02-14

申请号：US16164044

申请日：2018-10-18

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04L27/12 ,  H04B7/0413 ,  H04L27/26 ,  H04L27/14 ,  H04B7/04 ,  H04L25/03 ,  H04B7/06 ,  H04W72/00 ,  H04W72/08

摘要： A signal generation method is used in a transmission device that transmits a plurality of transmission signals from a plurality of antennas at the same frequency and at the same time, in the case where larger power change is performed on a first transmission signal than on a second transmission signal during generation process of the first transmission signal and the second transmission signal, the first transmission signal and the second transmission signal are mapped before the power change such that a minimum Euclidian distance between possible signal points for the first signal is longer than a minimum Euclidian distance between possible signal points for the second signal.

公开(公告)号：US20180316399A1

公开(公告)日：2018-11-01

申请号：US16028642

申请日：2018-07-06

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/04 ,  H04B7/0417 ,  H04L5/00 ,  H04L25/02 ,  H04L27/34 ,  H04B1/00 ,  H04L27/36 ,  H04L27/20 ,  H04B7/0426 ,  H04B7/0456

CPC分类号： H04B7/0469 ,  H04B1/0057 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/0465 ,  H04L5/00 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0048 ,  H04L25/0222 ,  H04L27/20 ,  H04L27/34 ,  H04L27/36

摘要： A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved.

公开(公告)号：US20180302133A1

公开(公告)日：2018-10-18

申请号：US16015578

申请日：2018-06-22

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0456 ,  H04B7/046 ,  H04B7/0615 ,  H04B7/0682 ,  H04L1/005

摘要： A transmission device comprising: a weighting circuitry which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuitry which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0≤yi

公开(公告)号：US20180294854A1

公开(公告)日：2018-10-11

申请号：US16004674

申请日：2018-06-11

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04L27/34 ,  H04L27/26 ,  H04L27/18 ,  H04L25/03 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/04

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0469 ,  H04B7/0617 ,  H04L1/005 ,  H04L1/0057 ,  H04L25/03171 ,  H04L25/03942 ,  H04L25/03949 ,  H04L27/18 ,  H04L27/2626 ,  H04L27/34

摘要： Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.

公开(公告)号：US20180270096A1

公开(公告)日：2018-09-20

申请号：US15987016

申请日：2018-05-23

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04L27/26 ,  H04L1/00 ,  H04B7/06 ,  H04B7/08

CPC分类号： H04L27/2628 ,  H04B7/0667 ,  H04B7/0682 ,  H04B7/0697 ,  H04B7/0842 ,  H04L1/0048 ,  H04L1/0071 ,  H04L5/0023 ,  H04L5/0082 ,  H04L5/12 ,  H04L27/20 ,  H04L27/265 ,  H04L27/368

摘要： 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.

公开(公告)号：US20180006685A1

公开(公告)日：2018-01-04

申请号：US15703360

申请日：2017-09-13

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/04 ,  H04L1/00 ,  H04L25/49 ,  H04L27/22 ,  H04L25/03 ,  H04L5/00 ,  H04L27/26 ,  H04B7/0417 ,  H04B7/0456 ,  H04L27/20

CPC分类号： H04B7/046 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0478 ,  H04L1/0042 ,  H04L1/007 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/0391 ,  H04L25/03942 ,  H04L25/4906 ,  H04L27/2032 ,  H04L27/22 ,  H04L27/2601 ,  H04L27/2602

摘要： Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.

公开(公告)号：US20170366240A1

公开(公告)日：2017-12-21

申请号：US15692030

申请日：2017-08-31

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04L27/26 ,  H04L25/03 ,  H04B7/0413 ,  H04B7/06 ,  H04L27/34 ,  H04L27/18 ,  H04B7/04

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0469 ,  H04B7/0617 ,  H04L25/03171 ,  H04L25/03942 ,  H04L25/03949 ,  H04L27/18 ,  H04L27/2626 ,  H04L27/34

摘要： Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.