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公开(公告)号：US20170117961A1
公开(公告)日：2017-04-27
申请号：US15302145
申请日：2015-04-10
发明人： Mikio YONEYAMA , Hiroto KAWAKAMI , Takashi ONO , Akihiko MATSUURA , Tomoyoshi KATAOKA , Katsuya TANAKA , Masahiro TACHIBANA , Yuya OYAMA
IPC分类号： H04B10/079 , H04L27/36 , H04B10/516
CPC分类号： H04B10/07955 , G02F1/01 , G02F2001/212 , G02F2201/58 , H04B10/00 , H04B10/5053 , H04B10/50575 , H04B10/5161 , H04B10/541 , H04B10/564 , H04J14/08 , H04L27/364
摘要： A light modulation device detects a power of the modulated optical signal modulated by each of an I-component optical modulator and a Q-component optical modulator, synchronously-detects a component of a frequency fd from the power of the modulated optical signal, outputs a dither signal of a frequency fd/n (where n is a positive integer equal to or larger than 1) applied to a first bias voltage or a second bias voltage when adjusting the first bias voltage or the second bias voltage, outputs two dither signals having a frequency fd/m (where m is a positive integer equal to or larger than 1, where n
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公开(公告)号：US20160006525A1
公开(公告)日：2016-01-07
申请号：US14837041
申请日：2015-08-27
CPC分类号： H04J3/0658 , H04J3/07 , H04J3/1652 , H04J14/0227 , H04Q11/0005 , H04Q2011/0045
摘要： A client signal mapping circuit for accommodating a client signal in a transmission frame, including: a buffer unit configured to temporarily store the client signal; a buffer used amount monitoring unit configured to report a used amount of the buffer unit; a stuff processing determination unit configured to compare the used amount of the buffer unit with a predetermined reference value, and a pseudo random sequence signal and the comparison result; an overhead insertion unit configured to add an overhead to the client signal read from the buffer unit to form a transmission frame; and a reading control unit configured to perform control for reading the client signal from the buffer unit based on determination by the stuff processing determination unit.
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