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公开(公告)号：US09455822B2
公开(公告)日：2016-09-27
申请号：US14417447
申请日：2013-08-27
发明人： Wataru Matsumoto , Toshiaki Akino , Yoshikuni Miyata , Kenya Sugihara , Takashi Sugihara , Takafumi Fujimori
IPC分类号： H04L27/00 , H04L7/00 , H04B1/76 , H03M13/00 , H04L7/033 , H04L1/00 , H03M13/45 , H03M13/11 , H03M13/15
CPC分类号： H04L7/0016 , H03M13/1105 , H03M13/1515 , H03M13/152 , H03M13/45 , H03M13/63 , H04B1/76 , H04L1/005 , H04L1/0057 , H04L7/0079 , H04L7/033
摘要： A transmitter for transmitting a transmission signal subjected to modulation after error correction coding and a receiver including a phase compensation unit for receiving the transmission signal and performing demodulation therefor while maintaining synchronization thereof and an error correction decoding unit for performing decoding processing for received data that has been subjected to the demodulation. The transmitter transmits a signal formed of a plurality of pilot sequences as a part of the transmission signal, and the receiver has a phase slip estimation processing function for estimating the phase slip by the phase compensation unit by using the plurality of pilot sequences, and for estimating a phase difference component by the error correction decoding unit, to thereby correct a phase of the received data.
摘要翻译： 一种发送器，用于发送在纠错编码之后进行调制的发送信号;以及接收机，包括用于接收发送信号的相位补偿单元，并进行解调，同时保持同步;以及纠错解码单元，对接收到的数据进行解码处理， 已经进行了解调。 发射机发送由多个导频序列形成的信号作为发送信号的一部分，并且接收机具有用于通过使用多个导频序列来估计相位补偿单元的相位滑移的相位滑移估计处理功能，并且 由纠错解码单元估计相位差分量，从而校正接收数据的相位。
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公开(公告)号：US09553695B2
公开(公告)日：2017-01-24
申请号：US15021862
申请日：2013-10-18
CPC分类号： H04L1/0054 , H03M13/45 , H04L1/0045 , H04L25/067 , H04L27/38
摘要： A phase of a symbol on an inner or outer circle of a received 8QAM symbol set, which is bitmapped by being assigned one bit depending on whether the symbol is on the inner or outer circle of a constellation mapping diagram and two bits for each of the quadrants, is rotated to generate, by QPSK likelihood generation, along with a likelihood of a received QPSK modulation symbol, a likelihood for the two bits assigned to the quadrant of the 8QAM modulated symbol set whose phase is rotated. Further, the phase-rotated 8QAM modulated symbol set is phase-rotated to the first quadrant of the diagram to move the symbol set to the QPSK symbol mapping positions, thereby generating, by QPSK likelihood generation, the likelihood for the one bit assigned to represent whether the symbol is on the outer circle or the inner circle of the 8QAM modulated symbol set.
摘要翻译： 在接收到的8QAM符号集合的内圈或外圆上的符号的相位，其根据符号是在星座映射图的内圈还是外圆被分配一位来进行位图匹配，并且每个 象限旋转以通过QPSK似然生成与所接收的QPSK调制符号的似然性一起产生分配给相位旋转的8QAM调制符号集的象限的两个比特的可能性。 此外，相位旋转的8QAM调制符号集相位旋转到图的第一象限，以将符号集移动到QPSK符号映射位置，从而通过QPSK似然生成生成分配给表示的一位的似然 符号是否在8QAM调制符号集的外圆圈或内圆上。
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公开(公告)号：US20150195081A1
公开(公告)日：2015-07-09
申请号：US14417447
申请日：2013-08-27
发明人： Wataru Matsumoto , Toshiaki Akino , Yoshikuni Miyata , Kenya Sugihara , Takashi Sugihara , Takafumi Fujimori
CPC分类号： H04L7/0016 , H03M13/1105 , H03M13/1515 , H03M13/152 , H03M13/45 , H03M13/63 , H04B1/76 , H04L1/005 , H04L1/0057 , H04L7/0079 , H04L7/033
摘要： A transmitter for transmitting a transmission signal subjected to modulation after error correction coding and a receiver including a phase compensation unit for receiving the transmission signal and performing demodulation therefor while maintaining synchronization thereof and an error correction decoding unit for performing decoding processing for received data that has been subjected to the demodulation. The transmitter transmits a signal formed of a plurality of pilot sequences as a part of the transmission signal, and the receiver has a phase slip estimation processing function for estimating the phase slip by the phase compensation unit by using the plurality of pilot sequences, and for estimating a phase difference component by the error correction decoding unit, to thereby correct a phase of the received data.
摘要翻译： 一种发送器，用于发送在纠错编码之后进行调制的发送信号;以及接收机，包括用于接收发送信号的相位补偿单元，并进行解调，同时保持同步;以及纠错解码单元，对接收到的数据进行解码处理， 已经进行了解调。 发射机发送由多个导频序列形成的信号作为发送信号的一部分，并且接收机具有用于通过使用多个导频序列来估计相位补偿单元的相位滑移的相位滑移估计处理功能，并且 由纠错解码单元估计相位差分量，从而校正接收数据的相位。
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4.发明申请公开(公告)号：US20140133867A1
公开(公告)日：2014-05-15
申请号：US14233267
申请日：2012-10-17
IPC分类号： H04B10/516
CPC分类号： H04B10/516 , H04B10/2513 , H04B10/50572 , H04B10/5161 , H04B10/5162 , H04B2210/254
摘要： A pre-equalization optical transmitter includes: a tap coefficient selecting unit for saving, in advance, a tap coefficients for generating an RZ pre-equalization signal and an NRZ pre-equalization signal, and for selecting and outputting one of the tap coefficients according to the value of a parameter that is a factor of transmission power fluctuations; a pre-equalization signal generating unit for generating the RZ pre-equalization signal or the NRZ pre-equalization signal based on the tap coefficient; and a modulating unit for generating a pre-equalization optical transmission signal by modulating an optical signal input from a light source by using a signal obtained through D/A conversion and amplification of the RZ pre-equalization signal or the NRZ pre-equalization signal, wherein a transmission method is switched between an RZ method and NRZ method by switching the tap coefficients by the tap coefficient selecting unit.
摘要翻译： 预均衡光发射机包括：抽头系数选择单元，用于预先保存用于产生RZ预均衡信号和NRZ预均衡信号的抽头系数，并用于根据所述抽头系数选择并输出其中一个抽头系数 作为传输功率波动因子的参数的值; 预均衡信号产生单元，用于基于抽头系数产生RZ预均衡信号或NRZ预均衡信号; 以及调制单元，用于通过使用通过D / A转换获得的信号和RZ预均衡信号或NRZ预均衡信号的放大来调制从光源输入的光信号来产生预均衡光传输信号， 其中通过由抽头系数选择单元切换抽头系数，在RZ方法和NRZ方法之间切换传输方法。
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5.发明授权公开(公告)号：US09118422B2
公开(公告)日：2015-08-25
申请号：US14233267
申请日：2012-10-17
IPC分类号： H04B10/516 , H04B10/2513
CPC分类号： H04B10/516 , H04B10/2513 , H04B10/50572 , H04B10/5161 , H04B10/5162 , H04B2210/254
摘要： A pre-equalization optical transmitter includes: a tap coefficient selecting unit for saving, in advance, a tap coefficients for generating an RZ pre-equalization signal and an NRZ pre-equalization signal, and for selecting and outputting one of the tap coefficients according to the value of a parameter that is a factor of transmission power fluctuations; a pre-equalization signal generating unit for generating the RZ pre-equalization signal or the NRZ pre-equalization signal based on the tap coefficient; and a modulating unit for generating a pre-equalization optical transmission signal by modulating an optical signal input from a light source by using a signal obtained through D/A conversion and amplification of the RZ pre-equalization signal or the NRZ pre-equalization signal, wherein a transmission method is switched between an RZ method and NRZ method by switching the tap coefficients by the tap coefficient selecting unit.
摘要翻译： 预均衡光发射机包括：抽头系数选择单元，用于预先保存用于产生RZ预均衡信号和NRZ预均衡信号的抽头系数，并用于根据所述抽头系数选择并输出其中一个抽头系数 作为传输功率波动因子的参数的值; 预均衡信号产生单元，用于基于抽头系数产生RZ预均衡信号或NRZ预均衡信号; 以及调制单元，用于通过使用通过D / A转换获得的信号和RZ预均衡信号或NRZ预均衡信号的放大来调制从光源输入的光信号来产生预均衡光传输信号， 其中通过由抽头系数选择单元切换抽头系数，在RZ方法和NRZ方法之间切换传输方法。
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公开(公告)号：US11888500B2
公开(公告)日：2024-01-30
申请号：US17888059
申请日：2022-08-15
发明人： Takafumi Fujimori
CPC分类号： H03M13/13 , H03M13/615 , H03M13/6575
摘要： An encoding circuit includes: a polar encoding unit capable of encoding a polar code of N bits; a frozen bit adding unit that generates a first sequence by adding frozen bits to an input signal; and a bit arrangement changing unit that: generates a second sequence of N bits by arranging the first sequence in the second sequence according to an arrangement rule dependent on a ratio of Nt bits, being a code length of a polar code to be encoded and being N bits or less, and N bits, and setting bit values at bit positions other than positions where the first sequence is arranged in the second sequence to zero when Nt bits are less than N bits; and inputs the second sequence to the polar encoding unit. A code word of Nt bits is generated by thinning processing based on a result of encoding the second sequence.
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公开(公告)号：US11539380B2
公开(公告)日：2022-12-27
申请号：US17382736
申请日：2021-07-22
发明人： Takafumi Fujimori
摘要： A decoding device includes: a hard decision decoder generating a first decoding result by performing hard decision decoding of a polar code using an input signal, and generating a first error detection result by performing first error detection processing on the first decoding result; a soft decision decoder generating a second decoding result by performing successive decoding of a polar code on the input signal, obtained for each decoding step in the successive decoding, and generating a second error detection result by performing second error detection processing on a result obtained by updating the first decoding result using the second decoding result; a data selector selecting and outputting either the first decoding result or the result obtained by updating the first decoding result using the second decoding result; and a controller stopping the soft decision decoder when the data selector outputs the final decoding result.
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