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1. 发明授权

US11290154B2 Control device, delay difference adjustment method, and non-transitory computer readable medium for storing delay difference adjustment program 有权
公开(公告)号：US11290154B2
公开(公告)日：2022-03-29
申请号：US16982286
申请日：2019-02-06
申请人： NEC CORPORATION
发明人： Ryuji Zenkyu , Eisaku Sasaki
IPC分类号： H04B7/0413 , H03K5/135 , H04B7/06 , H04B7/08 , H04W56/00
摘要： A control device causes a first transmission system in a MIMO transmission device to transmit a first transmitting-end clock transmission signal (first transmission signal), causes a second transmission system to transmit a second transmission signal, and causes the first transmission system to transmit a third transmission signal. The control device acquires a first phase value and a second phase value. The first phase value is a phase value of the second transmission signal received in the second reception system operating based on a receiving-end clock signal synchronous with a transmitting-end clock signal by the first transmission signal. The second phase value is a phase value of the third transmission signal received in the second reception system in synchronous operation. The control device calculates a first correction value for correcting a first delay amount set value of a delay adjustment processing unit based on the first and second phase values.

2. 发明授权

US09876668B2 Communication apparatus, demodulation apparatus, carrier reproduction apparatus, phase error compensation apparatus, phase error compensation method, and storage medium on which phase error compensation program has been stored 有权
公开(公告)号：US09876668B2
公开(公告)日：2018-01-23
申请号：US15110451
申请日：2015-01-15
申请人： NEC Corporation
发明人： Norifumi Kamiya , Eisaku Sasaki
IPC分类号： H04L27/38 , H04L27/00
CPC分类号： H04L27/3872 , H04L27/0014 , H04L2027/0067
摘要： To enable a large-capacity, high-quality data communication that is excellent in bit error rate characteristic even in an adverse noise environment mainly caused by phase noises or thermal noises. [Solution] Included are: a first phase error detection filter that generates, on the basis of a forward sequence of received symbols, a first phase difference value and a first phase error estimated value; a second phase error detection filter that generates, on the basis of a backward sequence of received symbols, a second phase difference value and a second phase error estimated value; a phase error combination means that generates a third phase error estimated value on the basis of the first and second phase error estimated values and one of the first and second phase difference values; and a phase error compensation means that compensates the phase error of the received symbols in accordance with the third phase error estimated value.

3. 发明授权

US10763973B2 Phase noise compensation apparatus, demodulation apparatus, communication apparatus, communication system, and phase noise compensation method 有权
公开(公告)号：US10763973B2
公开(公告)日：2020-09-01
申请号：US16325762
申请日：2017-05-16
申请人： NEC Corporation
发明人： Norifumi Kamiya , Eisaku Sasaki
IPC分类号： H04B10/61 , H04L27/38 , G01R29/26 , H04B10/294 , H04L25/02 , H04L27/26 , H04B10/516
摘要： A phase noise compensation apparatus is used for a demodulation apparatus for demodulating a transmission signal modulated by a modulation scheme that uses phase information for data identification. A phase detector detects a phase error of a reception pilot symbol sequence included in a reception symbol sequence. A first filter refers to the phase error detected in a time series manner and sequentially estimates first phase noise components. A second filter refers to the phase error detected in a reverse time series manner and sequentially estimates second phase noise components. The synthesis processing unit estimates a phase noise component of a reception symbol based on an estimated value of the first phase noise component, an estimated value of the second phase noise component, and the phase error. The phase rotator rotates a phase of the reception symbol based on the estimated phase noise component of the reception symbol.

4. 发明授权

US09136979B2 Carrier wave reproduction device and carrier wave reproduction method 有权
标题翻译：载波再现装置和载波再现方法
公开(公告)号：US09136979B2
公开(公告)日：2015-09-15
申请号：US14396089
申请日：2013-04-23
申请人： NEC CORPORATION
发明人： Norifumi Kamiya , Eisaku Sasaki
IPC分类号： H04L1/00 , H04L27/38 , H04L27/00 , H04L27/22
CPC分类号： H04L1/0036 , H04L1/0045 , H04L27/0014 , H04L27/22 , H04L27/3818 , H04L27/3836 , H04L2027/0024 , H04L2027/0046 , H04L2027/0061 , H04L2027/0067 , H04L2027/0087
摘要： The present invention provides a carrier wave reproduction device in which bit-error characteristics are improved without decreasing transmission capacity. The carrier wave reproduction device is equipped with an interpolation filter that estimates a phase error for a received symbol on the basis of a pilot symbol included in the received symbol, a first phase rotation machine that rotates a phase of the received symbol in response to the phase error estimated by the interpolation filter and then outputs the rotated symbol as a first output symbol, a phase error compensating unit that compensates for the phase error remaining in the first output symbol and then outputs the result of the compensation as a second output symbol, a QAM symbol demapping unit that calculates both a first bit string corresponding to the first output symbol and a second bit string corresponding to the second output signal, and an error correction decoder which performs error correction on the bit error in the first bit string and outputs the result. The phase error compensating unit refers to the first bit string after error correction has been performed thereon and then compensates for the phase error remaining in the first output symbol.
摘要翻译：本发明提供一种在不降低传输容量的情况下提高误码特性的载波再现装置。载波再现装置配备有内插滤波器，其基于包括在接收符号中的导频符号来估计接收符号的相位误差，第一相位旋转机器，响应于所接收的符号旋转接收符号的相位相位误差，然后输出旋转符号作为第一输出符号;相位误差补偿单元，补偿第一输出符号中剩余的相位误差，然后输出补偿结果作为第二输出符号， QAM符号解映射单元，其计算与第一输出符号对应的第一比特串和对应于第二输出信号的第二比特串;以及纠错解码器，对第一比特串中的比特错误进行纠错，并输出结果。相位误差补偿单元是在其上执行纠错之后的第一位串，然后补偿第一输出符号中剩余的相位误差。

5. 发明申请

US20150085960A1 CARRIER WAVE REPRODUCTION DEVICE AND CARRIER WAVE REPRODUCTION METHOD 有权
标题翻译：载波波复制器和载波波复制方法
公开(公告)号：US20150085960A1
公开(公告)日：2015-03-26
申请号：US14396089
申请日：2013-04-23
申请人： NEC CORPORATION
发明人： Norifumi Kamiya , Eisaku Sasaki
IPC分类号： H04L1/00 , H04L27/22
CPC分类号： H04L1/0036 , H04L1/0045 , H04L27/0014 , H04L27/22 , H04L27/3818 , H04L27/3836 , H04L2027/0024 , H04L2027/0046 , H04L2027/0061 , H04L2027/0067 , H04L2027/0087
摘要： The present invention provides a carrier wave reproduction device in which bit-error characteristics are improved without decreasing transmission capacity. The carrier wave reproduction device is equipped with an interpolation filter that estimates a phase error for a received symbol on the basis of a pilot symbol included in the received symbol, a first phase rotation machine that rotates a phase of the received symbol in response to the phase error estimated by the interpolation filter and then outputs the rotated symbol as a first output symbol, a phase error compensating unit that compensates for the phase error remaining in the first output symbol and then outputs the result of the compensation as a second output symbol, a QAM symbol demapping unit that calculates both a first bit string corresponding to the first output symbol and a second bit string corresponding to the second output signal, and an error correction decoder which performs error correction on the bit error in the first bit string and outputs the result. The phase error compensating unit refers to the first bit string after error correction has been performed thereon and then compensates for the phase error remaining in the first output symbol.
摘要翻译：本发明提供一种在不降低传输容量的情况下提高误码特性的载波再现装置。载波再现装置配备有内插滤波器，其基于包括在接收符号中的导频符号来估计接收符号的相位误差，第一相位旋转机器，响应于所接收的符号旋转接收符号的相位相位误差，然后输出旋转符号作为第一输出符号;相位误差补偿单元，补偿第一输出符号中剩余的相位误差，然后输出补偿结果作为第二输出符号， QAM符号解映射单元，其计算与第一输出符号对应的第一比特串和对应于第二输出信号的第二比特串;以及纠错解码器，对第一比特串中的比特错误进行纠错，并输出结果。相位误差补偿单元是在其上执行纠错之后的第一位串，然后补偿第一输出符号中剩余的相位误差。

6. 发明授权

US11438032B2 OAM reception apparatus, OAM reception method, and OAM transmission system 有权
公开(公告)号：US11438032B2
公开(公告)日：2022-09-06
申请号：US17288666
申请日：2019-10-08
申请人： NEC Corporation
发明人： Ryuji Zenkyu , Eisaku Sasaki
IPC分类号： H04L23/02 , H04B7/00 , H04B1/10 , H04B7/0417 , H04B7/06
摘要： An OAM reception apparatus (30) includes an OAM reception unit (34) and an interference compensation unit (35C) that are independent of each other. The OAM reception unit (34) and the interference compensation unit (35C) execute “OAM reception processing” and “interference compensation processing”, respectively, based on a plurality of vertical component signals and a plurality of horizontal component signals obtained by performing polarization separating and down-conversion on a plurality of reception radio signals received by a plurality of reception antenna elements (31-1 to 31-4).

7. 发明授权

US11362440B2 Antenna device, wireless transmitter, wireless receiver, and wireless communication system 有权
公开(公告)号：US11362440B2
公开(公告)日：2022-06-14
申请号：US16937040
申请日：2020-07-23
申请人： NEC CORPORATION
发明人： Ryuji Zenkyu , Eisaku Sasaki
IPC分类号： H01Q21/24 , H04B1/02
摘要： An antenna device includes a plurality of antenna elements. Each of the plurality of antenna elements outputs radio signals transmitted to another antenna device arranged so as to be opposed to the antenna device. At least one of the plurality of antenna elements is configured in such a way that a polarization direction of the radio signals to be output can be switched between a first direction and a second direction that is orthogonal to the first direction.

8. 发明申请

US20210028560A1 ANTENNA DEVICE, WIRELESS TRANSMITTER, WIRELESS RECEIVER, AND WIRELESS COMMUNICATION SYSTEM 有权
公开(公告)号：US20210028560A1
公开(公告)日：2021-01-28
申请号：US16937040
申请日：2020-07-23
申请人： NEC CORPORATION
发明人： Ryuji ZENKYU , Eisaku Sasaki
IPC分类号： H01Q21/24 , H04B1/02
摘要： An antenna device includes a plurality of antenna elements. Each of the plurality of antenna elements outputs radio signals transmitted to another antenna device arranged so as to be opposed to the antenna device. At least one of the plurality of antenna elements is configured in such a way that a polarization direction of the radio signals to be output can be switched between a first direction and a second direction that is orthogonal to the first direction.

9. 发明授权

US11159211B2 Radio transmission device, baseband processing device, radio transmission method, and radio reception device 有权
公开(公告)号：US11159211B2
公开(公告)日：2021-10-26
申请号：US16771431
申请日：2018-11-02
申请人： NEC Corporation
发明人： Ryuji Zenkyu , Eisaku Sasaki
IPC分类号： H04L27/00 , H04B7/0456
摘要： Provided is a radio transmission device, a baseband processing device, a radio transmission method, and a radio reception device that can reduce the peak to average power ratio in multiplex transmission using the OAM transmission system. In a baseband processing device (10), a signal formation unit (11) forms N number of multiplex signals corresponding to N number of antenna devices (32) by multiplying M number (M is a natural number equal to or larger than 2) of data symbols that are different from and parallel to each other by a “corrected weighting matrix”. The “corrected weighting matrix” is obtained by adding the phase rotation matrix for suppressing the peak to a fixed OAM basic weighting matrix.

10. 发明授权

US10998948B2 OAM reception apparatus, OAM reception method, and OAM transmission system 有权
公开(公告)号：US10998948B2
公开(公告)日：2021-05-04
申请号：US17039371
申请日：2020-09-30
申请人： NEC CORPORATION
发明人： Ryuji Zenkyu , Eisaku Sasaki
IPC分类号： H04B7/02 , H04B7/0456
摘要： An interference compensation unit in an OAM reception apparatus removes the interference component caused by horizontally polarized waves relative to vertically polarized waves from a first mode vertical component reception signal obtained by an OAM reception unit using both a first mode horizontal component reception signal and a second mode horizontal component reception signal.

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