Inventor

TAO ZHENNING

CN121 patents

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

TAO ZHENNING

FUJITSU LTD

Method for estimating channel power, method for monitoring frequency spectrum characteristic, apparatus and system

Frequency offset monitoring device and optical coherent receiver

Digital phase estimator, digital phase locked loop and optical coherent receiver

Optical DQPSK transmitter phase monitor and control

Phase monitor apparatus, phase control apparatus and methods thereof for optical DQPSK receiver

Phase monitor used in optical receiver

Monitoring apparatus for optical signal to noise ratio, signal transmission apparatus and receiver

Apparatus and method for generating transmitting sequence, training sequence synchronization apparatus and method, apparatus and method for estimating channel spacing and system

Calculating apparatus and method for nonlinear weighting coefficient

Method and apparatus for correcting inter-channel power imbalance and receiver

Estimation apparatus and method for nonlinear distortion and receiver

Nonlinear term selection apparatus and method, identification system and compensation system

Updating apparatus and method for equalizer coefficient, receiver and otpical communication system

Method and apparatus for compensating nonlinear distortions in intensity modulation-direct detection system

Timing synchronization apparatus and method for multi-carrier modulation signals

Inverse channel apparatus and transmitter, receiver and system containing the apparatus

Bias control apparatus and method of modulator of optical transmitter and optical transmitter

Compensation apparatus and method for inter-channel nonlinear damage

Apparatus and method for measuring frequency response characteristics of optical transmitter and optical receiver

Method, apparatus and communication system for evaluating nonlinear compensation performance

Mismatch error calibration method and apparatus of a time interleaving digital-to-analog converter

Method and apparatus for generating equivalent nonlinear noise

Bit allocation method, apparatus for multicarrier modulation signal, and system

Method and apparatus for adaptive nonlinear equalization in a polarization multiplexing optical communication system

Automatic bias control method and apparatus for optical transmitter

Measurement apparatus and method for nonlinear damages in optical link

Apparatus and method for processing a frequency offset of a pilot and receiver

Signal processing apparatus, apparatus and method for monitoring channel spacing and system

Compensation apparatus for offset drift, received signal recovery apparatus and receiver

Bias control apparatus and method of modulator of optical transmitter and optical transmitter

Apparatus and method for estimating intra-channel nonlinear damage

Apparatus and method for measuring nonlinear signal-to-noise ratio, and test instrument

Apparatus and method for monitoring polarization change

Inter-channel linear crosstalk estimation method and apparatus and receiver

Method and apparatus for monitoring the change of state of polarization and a receiver

Apparatus and method for monitoring change of polarization state resulted from optical link and optical receiver

LI LEI

Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver

Polarization scattering compensation device and polarization scattering compensation method

Adaptive optimization method and apparatus for average length

Frequency offset compensating apparatus and method, and optical coherent receiver

ZHANG HUIJIAN

Apparatus and method for frequency offset monitoring used in digital coherent optical receiver

Filter coefficient adjustment apparatus

Apparatus and method for equalizing chromatic dispersion and digital coherent optical receiver

DOU LIANG

Nonlinear compensating apparatus and transmitter

External modulator monitoring device and external modulator monitoring method

Simulation device and simulation method

LI JIANQIANG

Multi-stage phase estimation method and apparatus

Filter, coherent receiver device and coherent receiving method

LIU LING

Filter coefficient changing apparatus and method

TAO ZHENNING

Phase imbalance monitoring apparatus, amplitude imbalance monitoring apparatus, and apparatus using the same