公开(公告)号：US20180102820A1

公开(公告)日：2018-04-12

申请号：US15837422

申请日：2017-12-11

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04W72/04 ,  H04L27/26 ,  H04L25/06 ,  H04L25/03 ,  H04L25/02 ,  G06F11/10 ,  H04L1/00 ,  H04B7/06 ,  H04L5/00 ,  H04B7/04

CPC分类号： 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

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：US20180083687A1

公开(公告)日：2018-03-22

申请号：US15825498

申请日：2017-11-29

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

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

CPC分类号： H04B7/0697 ,  H04B7/0413 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0682 ,  H04B7/0862 ,  H04J11/0033 ,  H04L25/0391 ,  H04W52/42

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 scheme. 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：US20180076867A1

公开(公告)日：2018-03-15

申请号：US15807929

申请日：2017-11-09

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/06 ,  H04L29/06 ,  H04B7/0456 ,  H04L27/38 ,  H04L27/36 ,  H04L12/18 ,  H04B7/0413 ,  H04B17/12 ,  H04W52/22 ,  H04B17/00

CPC分类号： H04B7/0602 ,  H04B1/0096 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0682 ,  H04B17/0085 ,  H04B17/12 ,  H04J11/0033 ,  H04L12/189 ,  H04L27/36 ,  H04L27/38 ,  H04L65/4076 ,  H04W52/225

摘要： A transmission method of 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 regular ly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.

公开(公告)号：US20180076862A1

公开(公告)日：2018-03-15

申请号：US15805240

申请日：2017-11-07

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617

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：US20170230216A1

公开(公告)日：2017-08-10

申请号：US15496230

申请日：2017-04-25

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04L27/26 ,  H04L1/00 ,  H04B7/0456

CPC分类号： 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

摘要： 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：US20170180022A1

公开(公告)日：2017-06-22

申请号：US15450396

申请日：2017-03-06

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04B7/06

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

摘要： A transmission device comprising: a weighting circuity 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 circuity 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：US20160315689A1

公开(公告)日：2016-10-27

申请号：US15202924

申请日：2016-07-06

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/155 ,  H04B7/06 ,  H04W40/22 ,  H04B7/04

CPC分类号： H04B7/15542 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0604 ,  H04L5/0023 ,  H04L25/03171 ,  H04L25/0391 ,  H04L25/03949 ,  H04L27/2614 ,  H04L27/34 ,  H04W4/06 ,  H04W40/22

摘要： Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.

公开(公告)号：US20230098197A1

公开(公告)日：2023-03-30

申请号：US17992145

申请日：2022-11-22

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04B7/06 ,  H04B7/0413

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：US20220311484A1

公开(公告)日：2022-09-29

申请号：US17750626

申请日：2022-05-23

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04L1/00 ,  H04B7/06 ,  H04B1/713

摘要： Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

公开(公告)号：US20220278718A1

公开(公告)日：2022-09-01

申请号：US17733412

申请日：2022-04-29

申请人： Sun Patent Trust

发明人： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC分类号： H04B7/0456 ,  H04L25/03 ,  H04B7/06

摘要： Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.