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1. 发明公开

EP3493433A1 DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD 审中-公开
公开(公告)号：EP3493433A1
公开(公告)日：2019-06-05
申请号：EP18215726.3
申请日：2008-01-16
申请人： Nippon Telegraph and Telephone Corporation , NTT Electronics Corporation
发明人： KISAKA, Yoshiaki , OHARA, Takuya , AISAWA, Shigeki , MIYAMOTO, Yutaka , TAKEI, Kazuhito , ENDOH, Yasuyuki , MIURA, Katsuyoshi , NIKAIDO, Tadanobu , TOMIZAWA, Masahito
IPC分类号： H04J3/00 , H04L1/00 , H04L29/08
摘要： A digital transmission system (1403-1409) includes a rate adjusting means (1403, 1404) for adjusting the bit rate of a plurality of types of client signals to a bit rate range that can be accommodated in a digital frame transparently by inserting a dummy pattern, comprising a frame synchronization pattern, using a specific fixed frame, into the fixed frame for client signals other than the client signal having the highest bit rate among the plurality of types of client signals to increase the bit rate of the client signals. The number of bits of the dummy pattern and the number of bits of the client signal before the rate adjustment results in a rate M:N (where M and N are natural numbers) to construct the specific fixed frame, and the values N and M are set so that (Bc ±Ac) x (M + N)/N results in a bit rate range that can be accommodated in the digital frame, where the bit rate and the frequency accuracy of the client signal are Bc and ±Ac, respectively, wherein the dummy pattern of M bits is inserted to every N bits of the client signals.
The digital transmission system (1403-1409) further comprises rate restoring means (1408, 1409) for restoring the rate to an original bit rate of a client signal by discriminating the dummy pattern area using the frame synchronization pattern and deleting the dummy pattern on a receiver side.

2. 发明公开

EP3402146A1 PHASE COMPENSATION DEVICE, PHASE COMPENSATION METHOD AND COMMUNICATION APPARATUS 有权
公开(公告)号：EP3402146A1
公开(公告)日：2018-11-14
申请号：EP17813006.8
申请日：2017-04-13
申请人： NTT Electronics Corporation , Nippon Telegraph And Telephone Corporation
发明人： YAMAZAKI, Etsushi , NOUCHI, Hiroyuki , ONUMA, Yasuharu , TAKAMUKU, Tomohiro , OYAMA, Katsuichi , TAKEI, Kazuhito , TOMIZAWA, Masahito , KISAKA, Yoshiaki , YOSHIDA, Mitsuteru , NAKAMURA, Masanori
IPC分类号： H04L27/01 , H04B10/61 , H04L27/38
摘要： A symbol phase difference compensating portion (6) calculates a first phase difference which is a phase difference between a known pattern extracted from a received signal and a true value of the known pattern and performs phase compensation for the received signal based on the first phase difference. A tentative determination portion (12) tentatively determines an output signal of the symbol phase difference compensating portion (6) to acquire an estimated value of a phase. A first phase difference acquiring portion (13) acquires a second phase difference which is a phase difference between a phase of the output signal and the estimated value of the phase acquired by the tentative determination portion (12). A first phase difference compensating portion (14) performs phase compensation for the output signal based on the second phase difference.

3. 发明公开

EP3319246A1 DIGITAL SIGNAL PROCESSING DEVICE AND OPTICAL TRANSCEIVER 有权
标题翻译：数字信号处理装置和光收发器
公开(公告)号：EP3319246A1
公开(公告)日：2018-05-09
申请号：EP16846301.6
申请日：2016-09-05
申请人： NTT Electronics Corporation , Nippon Telegraph And Telephone Corporation
发明人： ISHIDA, Osamu , YAMAZAKI, Etsushi , TAKEI, Kazuhito , TOMIZAWA, Masahito , NISHIZAWA, Hideki
IPC分类号： H04B10/50 , H04B10/60
摘要： Signal processing sections (6a,6b) selectively switch modulation/demodulation in low-efficiency modulation system and modulation/demodulation in high-efficiency modulation system, and perform digital signal processing. Parallel-side interfaces of input/output interface sections (A,B) are electrically connected to the signal processing section (6a). A serial-side interface of the input/output interface section (B) is electrically connected to a serial-side interface of the input/output interface section (D). A selection section (7) electrically connects a parallel-side interface of the input/output interface section (C) to the signal processing section (6b) when the low-efficiency modulation system is selected, and electrically connects the parallel-side interface of the input/output interface section (C) to a parallel-side interface of the input/output interface section (D) when the high-efficiency modulation system is selected.
摘要翻译：信号处理部分（6a，6b）选择性地切换低效率调制系统中的调制/解调和高效率调制系统中的调制/解调，并执行数字信号处理。输入/输出接口部分（A，B）的并行侧接口电连接到信号处理部分（6a）。输入/输出接口部分（B）的串行侧接口电连接到输入/输出接口部分（D）的串行侧接口。当选择低效率调制系统时，选择部分（7）将输入/输出接口部分（C）的并行侧接口电连接到信号处理部分（6b），并且电连接当选择高效率调制系统时，将输入/输出接口部分（C）连接到输入/输出接口部分（D）的并行侧接口。

5. 发明授权

EP2348654B1 OPTICAL DIGITAL TRANSMISSION SYSTEM 有权
标题翻译：光数字传输系统
公开(公告)号：EP2348654B1
公开(公告)日：2015-04-08
申请号：EP09825930.2
申请日：2009-11-13
申请人： Nippon Telegraph And Telephone Corporation , NTT Electronics Corporation
发明人： AISAWA, Shigeki , TOMIZAWA, Masahito , MIYAMOTO, Yutaka , KISAKA, Yoshiaki , ENDO, Yasuyuki , MIURA, Katsuyoshi , TAKEI, Kazuhito
IPC分类号： H04J3/00 , H04J3/07 , H04J3/16
CPC分类号： H04J3/1652 , H04J3/076 , H04J2203/0089

6. 发明公开

EP1965528A1 OPTICAL TRANSMISSION SYSTEM AND METHOD 有权
标题翻译： OPTISCHESÜBERTRAGUNGSSYSTEMUND VERFAHREN
公开(公告)号：EP1965528A1
公开(公告)日：2008-09-03
申请号：EP06835092.5
申请日：2006-12-21
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION , NTT ELECTRONICS CORPORATION
发明人： KISAKA, Yoshiaki , AISAWA, Shigeki , MIYAMOTO, Yutaka , TOMIZAWA, Masahito , ENDOH, Yasuyuki , TAKEI, Kazuhito
IPC分类号： H04J3/00 , H04J14/00 , H04J14/02 , H04L12/28 , H04L12/56
CPC分类号： H04J3/1652 , H04J3/07 , H04J2203/0085
摘要： An optical transmission system for performing frequency synchronization even with a client signal with low frequency accuracy, and for transmitting thereof by accommodating/multiplexing without causing a bit slip. A new overhead is added to the entire client signal, and the signal including the new overhead being stuffed is transmitted in conjunction with a plurality of stuffing bits as an optical signal wherein a data storing bit for a negative stuffing, a stuffing information notification bit, and a stuff bits inserting bit for a positive stuffing in the payload are defined in plurality as stuffing bits for adjusting clock frequencies of the client signal in this new overhead.
摘要翻译：一种即使使用低频精度的客户端信号进行频率同步的光传输系统，也可以通过容纳/多路复用而不产生位滑动进行发送。在整个客户端信号中增加新的开销，并且包括填充的新开销的信号与多个填充位一起作为光信号发送，其中，用于负填充的数据存储位，填充信息通知位，并且用于在有效载荷中的正填充的填充比特插入位被定义为多个作为填充位，用于在该新开销中调整客户端信号的时钟频率。

7. 发明授权

EP3319246B1 DIGITAL SIGNAL PROCESSING DEVICE AND OPTICAL TRANSCEIVER 有权
公开(公告)号：EP3319246B1
公开(公告)日：2019-11-20
申请号：EP16846301.6
申请日：2016-09-05
申请人： NTT Electronics Corporation , Nippon Telegraph And Telephone Corporation
发明人： ISHIDA, Osamu , YAMAZAKI, Etsushi , TAKEI, Kazuhito , TOMIZAWA, Masahito , NISHIZAWA, Hideki
IPC分类号： H04B10/50 , H04B10/60

8. 发明公开

EP3435608A1 OPTICAL TRANSMISSION DISTORTION COMPENSATION DEVICE, OPTICAL TRANSMISSION DISTORTION COMPENSATION METHOD, AND COMMUNICATION DEVICE 有权转让
公开(公告)号：EP3435608A1
公开(公告)日：2019-01-30
申请号：EP17845848.5
申请日：2017-06-21
申请人： NTT Electronics Corporation , Nippon Telegraph and Telephone Corporation
发明人： ONUMA, Yasuharu , YAMAZAKI, Etsushi , NOUCHI, Hiroyuki , TAKAMUKU, Tomohiro , OYAMA, Katsuichi , TAKEI, Kazuhito , NAKAMURA, Masanori , YOSHIDA, Mitsuteru , TOMIZAWA, Masahito
IPC分类号： H04L27/01 , H04B10/2507 , H04B10/60 , H04L27/06
摘要： An I component compensation unit (15) calculates an I component in which a distortion has been compensated, by forming a first polynomial expressing the distortion of the I component based on an I component and a Q component of a quadrature modulation signal and multiplying each term of the first polynomial by a first coefficient. A Q component compensation unit (16) calculates a Q component in which a distortion has been compensated, by forming a second polynomial expressing the distortion of the Q component based on the I component and the Q component of the quadrature modulation signal and multiplying each term of the second polynomial by a second coefficient. A coefficient calculation unit (17) calculates the first and second coefficients by comparing outputs of the I component compensation unit (15) and the Q component compensation unit (16) and a known signal.

9. 发明公开

EP2106051A1 DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD 有权
标题翻译：数字传输系统和数字传送过程
公开(公告)号：EP2106051A1
公开(公告)日：2009-09-30
申请号：EP08703294.2
申请日：2008-01-16
申请人： Nippon Telegraph and Telephone Corporation , NTT Electronics Corporation
发明人： KISAKA, Yoshiaki , OHARA, Takuya , AISAWA, Shigeki , MIYAMOTO, Yutaka , TAKEI, Kazuhito , ENDOH, Yasuyuki , MIURA, Katsuyoshi , NIKAIDO, Tadanobu , TOMIZAWA, Masahito
IPC分类号： H04J3/00 , H04L1/00 , H04L29/08
CPC分类号： H04J3/1664 , H04J3/07 , H04J3/14 , H04J2203/0085 , H04J2203/0089 , H04L1/0061 , H04L1/24
摘要： A digital transmission system having at least a client device and a transmission device and rate-adjusting a client signal transmitted from the client device to the transmission device as necessary, to accommodate/multiplex the signal in a frame, is provided. The transmission device has a rate adjusting unit and a framer processing unit. The rate adjusting unit encapsulates the client signal using a predetermined frame structure, and inserts an idle pattern, as necessary, to perform rate adjustment to a bit rate that can be accommodated in the frame. The framer processing unit accommodates/multiplexes the signal into the frame after the rate adjustment. The digital transmission system accommodates, or accommodates and multiplexes, a bit string of the client signal directly in a payload portion, accommodates, or accommodates and multiplexes, the bit string in the payload portion after subjecting it to a reversible digital signal processing.

10. 发明授权

EP3435562B1 KNOWN SIGNAL DETECTION METHOD 有权
公开(公告)号：EP3435562B1
公开(公告)日：2020-09-16
申请号：EP17845847.7
申请日：2017-06-21
申请人： NTT Electronics Corporation , Nippon Telegraph and Telephone Corporation
发明人： ONUMA, Yasuharu , YAMAZAKI, Etsushi , TAKAMUKU, Tomohiro , TACHIBANA, Masahiro , YOSHIDA, Mitsuteru , TOMIZAWA, Masahito , OKAMOTO, Seiji
IPC分类号： H04B10/61 , H04L7/04 , H04L7/08 , H04L27/26

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