Inventor

KAKU TAKASHI

JP73 patents

⚠️ This page may combine multiple inventors who share the name “KAKU TAKASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KAKU TAKASHI

FUJITSU LTD

Method of signal transmission with selected signal transmission rate

Modulation method and apparatus

Phase jitter extraction circuit and phase jitter cancellation circuit

MODEM communication system having training means and method for training same

Two-wire full duplex frequency division multiplex modem system having echo cancellation means

Carrier phase control circuit

Modulator and demodulator apparatus

Transmission signal processing apparatus

Modulator and demodulator apparatus

Initialization equalization for modulation and demodulation using special training pattern

Automatic equalization device and method of starting-up the same

Transmission apparatus having echo cancellation facility

Noise canceling method and apparatus

Noise canceling method and apparatus

Receiver unit having synchronous pull-in circuit

Process and system for transferring vector signal with precoding for signal power reduction

Modem signal transmitter, modem signal transmitting method, modem signal receiver, modem signal receiving method, modem signal transmitting/receiving system and modem signal transmitting/receiving method

Process and system for transferring vector signal with precoding for signal power reduction

Apparatus and method of recovering a timing signal in a transmission apparatus by adjusting tap coefficients

Process and system for transferring vector signal with precoding for signal power reduction

Fixed equalizer and equalizing method

Automatic equalizer with a branched input for improved accuracy

Demodulation and roll-off filter apparatus

Automatic gain control circuit for a demodulation section of a modem

Method and device for timing pull-in of receiving equipment

Training method of data receiving equipment

Polling communication system and polling control method

Data transmission method and data transmission apparatus

Peak suppression method and data transmission apparatus

Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space

Special eye pattern and modulation and demodulation method using the same

Multiplex transmission system wherein analog signal is transformed to base band random-transformed and superimposed on dispersed signal points in vector signal space

Automatic equalizer and data mode convergence method

Frequency offset dealing modulator and demodulator apparatus

Training method for non-nyquist transmission system and training data transmission apparatus for non-nyquist transmission system

Line signal deterioration removing systems

Transversal type automatic equalizer with tap coefficient protection

Two-wire full-duplex modem

Digital automatic gain control circuit

Pull-in circuit for a digital phase locked loop

Method and apparatus for time equalization

Equalization processing method and the apparatus for periodic fluctuation of transmission line characteristic

Noise elimination method and apparatus

Error correction device and error correction method

Automatic gain control circuit, data communication device and automatic gain control method

PLL circuit

Frequency modulation method and modem unit employing such method

NEC TOKIN CORP

Modem coupling circuit for power-line carrier

NIPPON TELEGRAPH & TELEPHONE

Data transmission system