Inventor

YAMAZAKI ETSUSHI

JP47 patents

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

YAMAZAKI ETSUSHI

NIPPON TELEGRAPH & TELEPHONE

Coherent communication system, communication method, and transmission method

Optical signal transmission apparatus and optical signal transmission method

Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system

Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system

Optical transmission system, phase compensation method, and optical reception apparatus

Phase difference distribution estimation method and phase difference distribution estimation apparatus

Optical transmission system

Signal processing apparatus and signal processing method

Optical transmission system, optical transmitting apparatus, and optical receiving apparatus

Optical transmission/reception system, transmitter, receiver, and optical transmission/reception method

Optical wireless communication device and optical wireless communication method

Adaptive equalization filter and method for updating filter coefficients

Communication apparatus and optical communication system

Optical wireless communication system and optical wireless communication method

Signal processing apparatus, signal processing method, and program

Wavelength dispersion compensation apparatus, wavelength dispersion compensation method, and optical receiving apparatus

Transport apparatus and transport method

Optical receiving device and phase cycle reduction method

Coherent optical reception device

NTT ELECTRONICS CORP

Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication device

Data phase tracking device, data phase tracking method and communication device

Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus

Frame synchronization apparatus, optical communication apparatus, and frame synchronization method

Frame synchronization apparatus, optical communication apparatus, and frame synchronization method

Error correction device, error correction method, and communication device

Chromatic dispersion estimating circuit, optical reception device and chromatic dispersion amount estimating method

Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication device

Data processor, data processing method and communication device

Compensation coefficient calculation method

Error correction device, error correction method, and optical communication system

Phase compensation device, phase compensation method and communication apparatus

Processing equipment and remote management system

Digital signal processing device and optical transceiver apparatus

Known signal detection method

ISHIHARA KOICHI

Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system

Chromatic dispersion value calculating apparatus, optical signal receiving apparatus, optical signal transmitting apparatus, and chromatic dispersion value calculation method

Receiver device, communication system and receiving method

NTT INC

Optical signal emitting direction control apparatus and optical signal emitting direction control method

Symbol judgement apparatus, symbol judgement method and program

Optical transmission system, optical receiver, optical transmitter, control method and program

NAKAGAWA TADAO

Transmission method, reception method, transmitter apparatus, and receiver device

Frequency offset estimating method and frequency offset estimating apparatus

Frequency offset estimation apparatus, reception apparatus, frequency offset estimation method, and reception method

YAMAZAKI ETSUSHI

Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving device

Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception device

HORIKOSHI KENGO

Digital signal processing apparatus

KUDO RIICHI

Method for receiving frequency domain multiplexed signal and device for receiving frequency domain multiplexed signal