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1. 发明授权

US11770289B2 Communication device for transmitting data by using multilevel coding, and communication system 有权
公开(公告)号：US11770289B2
公开(公告)日：2023-09-26
申请号：US17242342
申请日：2021-04-28
申请人： FUJITSU LIMITED
发明人： Toshihiro Konno , Junichi Sugiyama , Yohei Koganei
IPC分类号： H04L27/34 , H04L27/00 , H04B10/516 , H04L27/38 , H04B10/61 , H04L27/36
CPC分类号： H04L27/3405 , H04B10/516 , H04B10/612 , H04L27/0012 , H04L27/36 , H04L27/38
摘要： A communication device that generates a modulated signal with 32 QAM includes a modulator, a first encoder and a second encoder. The modulator generates a modulated signal by mapping each symbol in a data frame that includes transmission data, a first code, and a second code to a signal point among 32 QAM signal points. The first encoder encodes the data by using a first coding scheme to generate the first code. The second encoder encodes, by using a second coding scheme, a bit string formed from one specified bit in five bits allocated to each symbol in the data frame to generate the second code. The modulator performs mapping such that each pair of signal points adjacent to each other are arranged are different from each other in terms of a value of the one specified bit among the five bits.

2. 发明申请

US20230069705A1 SIGNAL PROCESSING DEVICE AND TRANSMISSION DEVICE 有权
公开(公告)号：US20230069705A1
公开(公告)日：2023-03-02
申请号：US17828082
申请日：2022-05-31
申请人： FUJITSU LIMITED
发明人： Yohei Koganei
IPC分类号： H04L25/06
摘要： A signal processing device includes: a memory; and a processor coupled to the memory and configured to: perform soft decision of a value of, among bit strings, a predetermined bit string encoded with a soft decision code from a symbol assigned to, according to each value of the bit strings, the bit strings having been subject to encoding of an outer code with a turbo product code and encoding of an inner code with the soft decision code; decode the predetermined bit string with the soft decision code on a basis of a result of the soft decision; individually perform, from the symbol, the soft decision of a value of each bit string other than the predetermined bit string among the bit strings; and decode the bit strings with the turbo product code on a basis of a result of the decoding and a result of the soft decision.

3. 发明授权

US09825731B2 Optical transmission system, optical transmission apparatus, and optical transmission method 有权
公开(公告)号：US09825731B2
公开(公告)日：2017-11-21
申请号：US15057424
申请日：2016-03-01
申请人： FUJITSU LIMITED
发明人： Taizo Maeda , Yohei Koganei , Ichiro Nakajima
IPC分类号： H03M13/00 , H04L1/00 , H04B10/079 , H04J14/02 , H04B10/077 , H04L27/26
CPC分类号： H04L1/0041 , H04B10/0775 , H04B10/07957 , H04J14/0201 , H04J14/0298 , H04L1/0009 , H04L27/2601 , H04L2001/0092
摘要： An optical transmission system includes a first optical transmission apparatus that adds a plurality of error correction codes to a main signal, retrieves, from a first error correction code that is added to the main signal and that corresponds to a first sub-carrier among the plurality of sub-carriers, a first code portion in excess of a predetermined redundancy level, distributes the first code portion to a second sub-carrier among the plurality of sub-carriers, concatenates a second code portion into the first error correction code, and transmits an optical signal including the main signal multiplexed with the first error correction code that has been concatenated with the second code portion.

4. 发明申请

US20220038327A1 COMMUNICATION DEVICE FOR TRANSMITTING DATA BY USING MULTILEVEL CODING, AND COMMUNICATION SYSTEM 有权
公开(公告)号：US20220038327A1
公开(公告)日：2022-02-03
申请号：US17242342
申请日：2021-04-28
申请人： FUJITSU LIMITED
发明人： Toshihiro Konno , Junichi Sugiyama , Yohei Koganei
IPC分类号： H04L27/34 , H04L27/00 , H04L27/36 , H04L27/38 , H04B10/61 , H04B10/516
摘要： A communication device that generates a modulated signal with 32 QAM includes a modulator, a first encoder and a second encoder. The modulator generates a modulated signal by mapping each symbol in a data frame that includes transmission data, a first code, and a second code to a signal point among 32 QAM signal points. The first encoder encodes the data by using a first coding scheme to generate the first code. The second encoder encodes, by using a second coding scheme, a bit string formed from one specified bit in five bits allocated to each symbol in the data frame to generate the second code. The modulator performs mapping such that each pair of signal points adjacent to each other are arranged are different from each other in terms of a value of the one specified bit among the five bits.

5. 发明申请

US20210218496A1 ENCODING CIRCUIT, DECODING CIRCUIT, AND ENCODING METHOD 有权
公开(公告)号：US20210218496A1
公开(公告)日：2021-07-15
申请号：US17093862
申请日：2020-11-10
申请人： FUJITSU LIMITED
发明人： Yohei Koganei , Kiichi Sugitani
IPC分类号： H04L1/00 , H04L27/26 , H04J14/02
摘要： An encoding circuit includes an allocator to allocate a symbol to bit-strings within a first frame, a converter to convert values of target-bit-strings that exclude a predetermined-bit-string so that, as a region within the constellation is closer to a center of the constellation, a number of symbols allocated in the region is larger, a generator to generate an error-correction-code of the bit-strings, and an insertion circuit to delay the error-correction-code and insert the error-correction-code in the predetermined-bit-string within a second frame that succeeds the first frame, wherein the allocator allocates, to the bit-strings, one symbol that corresponds to the values of the target-bit-strings, the one symbol being within a quadrant that corresponds to a value of the predetermined bit-string, and wherein the converter switches, based on the value of the predetermined-bit-string, association relationships between the values of the target-bit-strings before and after the conversion.

6. 发明授权

US11283542B2 Encoding circuit, decoding circuit, and encoding method 有权
公开(公告)号：US11283542B2
公开(公告)日：2022-03-22
申请号：US17093862
申请日：2020-11-10
申请人： FUJITSU LIMITED
发明人： Yohei Koganei , Kiichi Sugitani
IPC分类号： H04L1/00 , H04L27/26 , H04J14/02
摘要： An encoding circuit includes an allocator to allocate a symbol to bit-strings within a first frame, a converter to convert values of target-bit-strings that exclude a predetermined-bit-string so that, as a region within the constellation is closer to a center of the constellation, a number of symbols allocated in the region is larger, a generator to generate an error-correction-code of the bit-strings, and an insertion circuit to delay the error-correction-code and insert the error-correction-code in the predetermined-bit-string within a second frame that succeeds the first frame, wherein the allocator allocates, to the bit-strings, one symbol that corresponds to the values of the target-bit-strings, the one symbol being within a quadrant that corresponds to a value of the predetermined bit-string, and wherein the converter switches, based on the value of the predetermined-bit-string, association relationships between the values of the target-bit-strings before and after the conversion.

7. 发明授权

US09467318B2 Communication system, receiving device, and semiconductor device 有权
标题翻译：通信系统，接收设备和半导体设备
公开(公告)号：US09467318B2
公开(公告)日：2016-10-11
申请号：US14671221
申请日：2015-03-27
申请人： FUJITSU LIMITED
发明人： Daijiro Tanaka , Yohei Koganei
IPC分类号： H04L5/12 , H04L27/227 , H04B10/516 , H04B10/61
CPC分类号： H04L27/2275 , H04B10/516 , H04B10/6165 , H04L27/2273
摘要： A communication system includes a transmitting device that transmits a signal based on pluralities of symbol coordinates on a constellation and pluralities of trajectory coordinates between respective ones of the pluralities of symbol coordinates, average coordinates of the pluralities of trajectory coordinates being different coordinates from coordinates of origin, and a receiving device that accumulates pluralities of trajectory coordinates between respective ones of the pluralities of symbol coordinates on the constellation in the signal received from the transmitting device, and estimates a phase of the signal received from the transmitting device based on a value representing a difference between average coordinates of the pluralities of trajectory coordinates accumulated and the different coordinates.
摘要翻译：通信系统包括发送装置，其基于星座上的多个符号坐标发送信号，并且在多个符号坐标中的各个符号坐标之间的多个轨迹坐标，多个轨迹坐标的平均坐标是与原点坐标不同的坐标以及接收装置，其在从所述发送装置接收到的信号中累积所述星座上的多个符号坐标的各个符号坐标之间的多个轨迹坐标，并且基于表示所述发送装置的值来估计从所述发送装置接收的信号的相位累积的多个轨迹坐标的平均坐标与不同坐标之间的差。

8. 发明授权

US09438461B2 Communication system, receiving device, and semiconductor device 有权
标题翻译：通信系统，接收设备和半导体设备
公开(公告)号：US09438461B2
公开(公告)日：2016-09-06
申请号：US14644934
申请日：2015-03-11
申请人： FUJITSU LIMITED
发明人： Daijiro Tanaka , Yohei Koganei
IPC分类号： H04L5/12 , H04L27/34 , H04B10/00 , H04L27/00
CPC分类号： H04L27/3444 , H04B10/00 , H04B10/516 , H04L27/0014 , H04L2027/0024 , H04L2027/0067
摘要： A communication system includes a transmission device that transmits a signal, based on a plurality of symbol coordinates on a constellation, which characterize a shape having a predetermined rotational asymmetrical shape, and a receiving device that accumulates symbol coordinates on the constellation in the signal received from the transmission device and estimates the phase of the signal received from the transmission device, based on a difference between the direction of a shape characterized by the accumulated symbol coordinates and the direction of the predetermined shape.
摘要翻译：通信系统包括发送装置，其基于星座上的多个符号坐标发送信号，其表征具有预定旋转非对称形状的形状;以及接收装置，其在从所述星座中接收的信号中累积符号坐标发送装置，基于由累积符号坐标表示的形状的方向与预定形状的方向之间的差异，估计从发送装置接收到的信号的相位。

9. 发明申请

US20150295740A1 COMMUNICATION SYSTEM, RECEIVING DEVICE, AND SEMICONDUCTOR DEVICE 有权
标题翻译：通信系统，接收设备和半导体器件
公开(公告)号：US20150295740A1
公开(公告)日：2015-10-15
申请号：US14671221
申请日：2015-03-27
申请人： FUJITSU LIMITED
发明人： Daijiro Tanaka , Yohei Koganei
IPC分类号： H04L27/227 , H04L7/08
CPC分类号： H04L27/2275 , H04B10/516 , H04B10/6165 , H04L27/2273
摘要： A communication system includes a transmitting device that transmits a signal based on pluralities of symbol coordinates on a constellation and pluralities of trajectory coordinates between respective ones of the pluralities of symbol coordinates, average coordinates of the pluralities of trajectory coordinates being different coordinates from coordinates of origin, and a receiving device that accumulates pluralities of trajectory coordinates between respective ones of the pluralities of symbol coordinates on the constellation in the signal received from the transmitting device, and estimates a phase of the signal received from the transmitting device based on a value representing a difference between average coordinates of the pluralities of trajectory coordinates accumulated and the different coordinates.
摘要翻译：通信系统包括发送装置，其基于星座上的多个符号坐标发送信号，并且在多个符号坐标中的各个符号坐标之间的多个轨迹坐标，多个轨迹坐标的平均坐标是与原点坐标不同的坐标以及接收装置，其在从所述发送装置接收到的信号中累积所述星座上的多个符号坐标的各个符号坐标之间的多个轨迹坐标，并且基于表示所述发送装置的值来估计从所述发送装置接收的信号的相位累积的多个轨迹坐标的平均坐标与不同坐标之间的差。

10. 发明公开

US20230170920A1 ENCODER CIRCUIT, DECODER CIRCUIT, ENCODING METHOD, AND DECODING METHOD FOR MULTILEVEL CODING 审中-公开
公开(公告)号：US20230170920A1
公开(公告)日：2023-06-01
申请号：US17983431
申请日：2022-11-09
申请人： Fujitsu Limited
发明人： Yohei Koganei
IPC分类号： H03M13/11 , H04L27/36
CPC分类号： H03M13/11 , H04L27/36
摘要： Encoder circuit encodes information bits using 22N signal points. The encoder circuit includes: symbol mapper that allocates each symbol of frame including information bits, first code and second code to a corresponding signal point among 22N signal points according to mapping pattern; converter that converts information bits in other bit strings among N bit strings forming the frame excluding MSB string by using probabilistic shaping; first encoder that generates the first code from information bits in MSB string and the information bits converted by the converter; and second encoder that generates the second code from the information bits in MSB string and the first code. In the mapping pattern, values of bits corresponding to the other bit strings are arranged symmetrically in the constellation, and each pair of adjacent signal points on the constellation are different from each other in terms of value of bit corresponding to MSB string.

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