Inventor
KAWADA NOBORU
JP19 patents
Patents
19 patentsUS5757865AMay 26, 1998
Carrier phase control circuit
FUJITSU LTD49 citations92
US5625643AApr 29, 1997
Modulator and demodulator apparatus
FUJITSU LTD27 citations92
US5563908AOct 8, 1996
Modulator and demodulator apparatus
FUJITSU LTD27 citations92
US5537437AJul 16, 1996
Initialization equalization for modulation and demodulation using special training pattern
FUJITSU LTD24 citations92
US5515429AMay 7, 1996
Backup apparatus against line defect and backup method against line defect
FUJITSU LTD30 citations86
US6298036B1Oct 2, 2001
Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
FUJITSU LTD7 citations73
US5710754AJan 20, 1998
Multiplex transmission system wherein analog signal is transformed to base band random-transformed and superimposed on dispersed signal points in vector signal space
FUJITSU LTD10 citations73
US5432786AJul 11, 1995
Modem for modulating and demodulating main signal and secondary signal with clock synchronized system and transforming secondary signal between start-stop system and clock-synchronized system
FUJITSU LTD8 citations73
US6021160AFeb 1, 2000
Training method for non-nyquist transmission system and training data transmission apparatus for non-nyquist transmission system
FUJITSU LTD7 citations72
US5388122AFeb 7, 1995
Modulation and demodulation system
FUJITSU LTD10 citations71
US6377647B1Apr 23, 2002
PLL circuit
FUJITSU LTD5 citations63
US5442656AAug 15, 1995
Timing extraction device and data transmission device using the timing extraction device
FUJITSU LTD5 citations63
US6448861B2Sep 10, 2002
PLL controller, method of PLL control, and limiter
FUJITSU LTD3 citations62
US6282237B1Aug 28, 2001
Multiple transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
FUJITSU LTD2 citations62
US6226302B1May 1, 2001
Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
FUJITSU LTD1 citations62
US5963593AOct 5, 1999
Line equalizer control method, and integrating circuit, frequency shift circuit and transmission device
FUJITSU LTD6 citations62
US5648993AJul 15, 1997
Method and apparatus for synchronizing modem transmission by controlling a measured phase difference between an internal timing signal and a transmission timing signal
FUJITSU LTD5 citations62
US6002712ADec 14, 1999
Timing phase control apparatus and timing phase control method
FUJITSU LTD0 citations52
US6078624AJun 20, 2000
Judging method and a precoding apparatus
FUJITSU LTD0 citations51