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公开(公告)号:US20230036708A1
公开(公告)日:2023-02-02
申请号:US17481657
申请日:2021-09-22
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04B7/0456 , H04B7/0413 , H04J11/00 , H04L25/03 , H04L1/06 , H04B7/06
摘要: Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.
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公开(公告)号:US20220131597A1
公开(公告)日:2022-04-28
申请号:US17572771
申请日:2022-01-11
申请人: Sun Patent Trust
发明人: Mikihiro OUCHI , Yutaka MURAKAMI , Tomohiro KIMURA
IPC分类号: H04B7/08 , H04B7/06 , H04B7/0413 , H04L1/00 , H04W72/04
摘要: Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device.
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公开(公告)号:US20210306195A1
公开(公告)日:2021-09-30
申请号:US17338092
申请日:2021-06-03
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
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.
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公开(公告)号:US20210234629A1
公开(公告)日:2021-07-29
申请号:US17231469
申请日:2021-04-15
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04L1/00 , H03M13/25 , H04L1/08 , H04B7/0413
摘要: An encoder outputs a first bit sequence having N bits. A mapper generates a first complex signal s1 and a second complex signal s2 with use of bit sequence having X+Y bits included in an input second bit sequence, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2. A bit length adjuster is provided after the encoder, and performs bit length adjustment on the first bit sequence such that the second bit sequence has a bit length that is a multiple of X+Y, and outputs the first bit sequence after the bit length adjustment as the second bit sequence. As a result, a problem between a codeword length of a block code and the number of bits necessary to perform mapping by a set of modulation schemes is solved.
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公开(公告)号:US20210234582A1
公开(公告)日:2021-07-29
申请号:US17227561
申请日:2021-04-12
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04B7/0456 , H04B7/0417 , H04B7/0426 , H04L27/34 , H04L25/02 , H04L5/00 , H04L27/20 , H04L27/36 , H04B1/00
摘要: A transmission apparatus that (i) generates a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence, (ii) generates a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence, (iii) generates a transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t), wherein an average transmission power of the 16-QAM modulation signal s2(t) being the same as an average transmission power of the QPSK modulation signal s1(t), and (iv) transmits the transmission signal z1(t) from a first antenna at a first time and a first frequency and the second transmission signal z2(t) from a second antenna at the first time and the first frequency.
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公开(公告)号:US20210203403A1
公开(公告)日:2021-07-01
申请号:US17201274
申请日:2021-03-15
申请人: Sun Patent Trust
发明人: Mikihiro OUCHI , Yutaka MURAKAMI , Tomohiro KIMURA
IPC分类号: H04B7/10 , H04B7/0456 , H04L5/00 , H04B7/0413 , H04W52/02 , H01Q21/24 , H04B1/06
摘要: Provided is control information related to polarizations of antennas for MISO communication. The control signal generator generates polarization information indicating whether antennas used for transmission by MISO have only a first polarization or have a second polarization as well as the first polarization. With this structure, the present invention allows for the use of combinations of SISO, MISO and MIMO, taking the polarization of antennas. Furthermore, the present invention enables the receiver to reduce the power consumption.
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公开(公告)号:US20210184731A1
公开(公告)日:2021-06-17
申请号:US17168955
申请日:2021-02-05
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04B7/0456 , H04L1/00 , H04L5/00 , H04L25/03 , H04L25/49 , H04L27/20 , H04L27/22 , H04B7/0417 , H04L27/26
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.
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公开(公告)号:US20210143891A1
公开(公告)日:2021-05-13
申请号:US17104328
申请日:2020-11-25
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04B7/06 , H04W52/42 , H04B7/0413 , H04B7/0426 , H04B7/0456 , H04B7/08 , H04L25/03
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.
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公开(公告)号:US20210105048A1
公开(公告)日:2021-04-08
申请号:US16872874
申请日:2020-05-12
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04B7/0456 , H04B7/0413 , H04J11/00 , H04L25/03 , H04L1/06 , H04B7/06
摘要: Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.
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公开(公告)号:US20200295857A1
公开(公告)日:2020-09-17
申请号:US16891379
申请日:2020-06-03
申请人: Sun Patent Trust
发明人: Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC分类号: H04H20/59 , H04H60/42 , H04H60/51 , H04L27/20 , H04B1/16 , H04L27/00 , H04N21/488 , H04N21/81 , H04N21/422 , H04N21/45 , H04L1/00 , H04N21/6543 , H04L27/22
摘要: A transmission method for transmitting an emergency warning signal, pertaining to one aspect of the present disclosure, includes: generating control information, the control information including a flag indicating either presence or absence of information related to a region and, when the flag indicates presence, information related to the region; acquiring information related to emergency warning content; and generating the emergency warning signal including the control information and the information related to the emergency warning content. Thus, emergency warning (early warning) information can be transmitted with greater precision.
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