Inventor
KOIZUMI NOBUKAZU
JP47 patents
⚠️ This page may combine multiple inventors who share the name “KOIZUMI NOBUKAZU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
38 patentsUS5659609AAug 19, 1997
Echo canceller and waveform-distortion compensation device
FUJITSU LTD109 citations98
US5617450AApr 1, 1997
Digital subscriber loop interface unit
FUJITSU LTD135 citations98
US6735244B1May 11, 2004
Data transmission system and receiver unit thereof
FUJITSU LTD114 citations97
US6393051B1May 21, 2002
Digital subscriber line communicating system and a transceiver in the system
FUJITSU LTD28 citations92
US5841809ANov 24, 1998
Access line termination unit
FUJITSU LTD45 citations92
US5638409AJun 10, 1997
Data receiving device for reproducing a received symbol from a received data signal
FUJITSU LTD49 citations92
US5375147ADec 20, 1994
Jitter compensating device
FUJITSU LTD53 citations92
US7423984B2Sep 9, 2008
Digital subscriber line transmission method, apparatus and system
FUJITSU LTD28 citations91
US7336627B1Feb 26, 2008
Digital subscriber line transmission method, apparatus and system
FUJITSU LTD23 citations91
US5367540ANov 22, 1994
Transversal filter for use in a digital subscriber line transmission interface
FUJITSU LTD102 citations91
US7167509B2Jan 23, 2007
Digital subscriber line communicating system and a transceiver in the system
FUJITSU LTD15 citations84
US7024442B2Apr 4, 2006
Processing apparatus
FUJITSU LTD14 citations84
US6965617B2Nov 15, 2005
Resynchronous control apparatus of subscriber communication machine, and resynchronizing method
FUJITSU LTD12 citations84
US7386037B2Jun 10, 2008
Digital subscriber line communicating system
FUJITSU LTD3 citations74
US7173984B2Feb 6, 2007
Digital subscriber line communicating system
FUJITSU LTD3 citations74
US7126995B2Oct 24, 2006
Digital subscriber line communicating system
FUJITSU LTD4 citations74
US7072386B1Jul 4, 2006
Digital subscriber line communicating system and a transceiver in the system
FUJITSU LTD9 citations74
US6965649B1Nov 15, 2005
Digital subscriber line communicating system
FUJITSU LTD7 citations74
US5399985AMar 21, 1995
Digital PLL circuit
FUJITSU LTD7 citations73
US7158290B2Jan 2, 2007
Controlling apparatus for optical amplifier and controlling method thereof
FUJITSU LTD7 citations72
US11159352B2Oct 26, 2021
Adaptive equalizer, optical receiver, and optical transmission system
FUJITSU LTD0 citations63
US11146428B2Oct 12, 2021
Adaptive equalizer, optical receiver, and adaptive equalization method
FUJITSU LTD1 citations63
US7088783B2Aug 8, 2006
Digital subscriber line communicating system determining signal-to-noise ratios
FUJITSU LTD1 citations63
US6944216B2Sep 13, 2005
Digital subscriber line communicating system
FUJITSU LTD1 citations63
US11476946B2Oct 18, 2022
Signal processing device and transmission device
FUJITSU LTD0 citations62
US9407471B2Aug 2, 2016
Adaptive equalizer tap coefficient correction method and optical receiver
FUJITSU LTD2 citations62
US7417792B2Aug 26, 2008
Optical amplification device
FUJITSU LTD4 citations61
US7388711B2Jun 17, 2008
Controlling apparatus for optical amplifier and controlling method thereof
FUJITSU LTD4 citations61
US7286495B2Oct 23, 2007
Digital subscriber line transmission method, apparatus and system
FUJITSU LTD2 citations61
US10560199B2Feb 11, 2020
Signal processing circuit and optical receiving device
FUJITSU LTD1 citations60
US7555055B2Jun 30, 2009
Digital subscriber line communicating system
FUJITSU LTD0 citations52
US7295620B2Nov 13, 2007
Digital subscriber line communicating system
FUJITSU LTD0 citations52
US9660733B2May 23, 2017
Signal processing apparatus, signal processing method, and signal processing system
FUJITSU LTD0 citations51
US9444554B2Sep 13, 2016
Digital coherent receiving apparatus
FUJITSU LTD0 citations51
US10931485B2Feb 23, 2021
Adaptive equalization circuit and optical receiver
FUJITSU LTD0 citations50
US10177855B2Jan 8, 2019
Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method
FUJITSU LTD0 citations50
US9496966B2Nov 15, 2016
Optical communication receiving device and frequency offset compensation method
FUJITSU LTD0 citations41
US9680667B2Jun 13, 2017
Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method
FUJITSU LTD0 citations40