Inventor

HWANG SEONG-TAEK

KR219 patents

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

HWANG SEONG-TAEK

SAMSUNG ELECTRONICS CO LTD

Remote antenna unit and wavelength division multiplexing radio-over-fiber network

Wavelength-division multiplexed self-healing passive optical network

Apparatus and method for performing time synchronization using GPS information in communication system

Remote access unit and radio-over-fiber network using same

Duobinary optical transmission device using at least one semiconductor optical amplifier

Wavelength division multiplexed passive optical network system

Low noise multi-wavelength light source and wavelength division multiplexing system using same

Optical signal transmission apparatus including reflective gain-clamped semiconductor optical amplifier

Optical transceiver and passive optical network using the same

Wide band erbium-doped fiber amplifier (EDFA)

Wide band erbium-doped fiber amplifier (EDFA)

Automatic gain control device of optical fiber amplifier

Optical attenuator using isolator and optical communications system including the same

Optical fiber amplifier for controlling gain flatness

Optical fiber amplifier having constant output power for each channel and amplifying method thereof

Method and system for managing energy in sensor network environment using spanning tree

Apparatus and method for executing functions related to handwritten user input on lock screen

Radio over fiber link apparatus of time division duplex scheme

Method and system for retransmitting internet protocol packet for terrestrial digital multimedia broadcasting service

Method and system for assigning radio resources in cellular system using wired relay stations

Method and apparatus of adaptively allocating transmission power for beamforming combined with orthogonal space-time block codes based on symbol error rate in distributed wireless communication system

Single wavelength bi-directional RoF link apparatus or signal transmission in TDD wireless system

Method and apparatus for guaranteeing quality of service in a residential ethernet system

Network system for interworking W-LAN and 3G mobile communication network through RoF link and authentication method according to interworking in the network system

Polarization duobinary optical transmitter

Self-healing wavelength division multiplexing-passive optical network system

Multi-wavelength light source and wavelength division multiplexing system using the same

Passive optical network using loop back of multi-wavelength light generated at central office

Apparatus and method for tracking optical wavelength in WDM passive optical network using loop-back light source

Semiconductor optical amplifier having photo detector and method of fabricating the same

Reflective semiconductor optical amplifier

Gain-clamped semiconductor optical amplifier using Raman amplification principle

Optical fiber amplifier

Erbium doped fiber amplifier suitable for long wavelength light signal

Method and apparatus for joint scheduling to increase frequency efficiency and fairness in a multi-channel distributed antenna system using frequency reuse and common power control

Wide-band erbium-doped fiber amplifier and wavelength division multiplexing optical transmission system

Method and apparatus for processing image

Method for performing softer handover in a broadband wireless communication system

Wavelength division multiplexing light source apparatus using semiconductor optical amplifier

Bidirectional optical add/drop multiplexer and wavelength division multiplexed ring network using the same

KIM HYUN-SOO

Method and apparatus for recognizing characters

CHOI DO-IN

Method for controlling handoff in optical distributed network system using multi input multi output

KIM JI-HOON

Document editing apparatus and method

KIM SANG-HO

Time division duplexing remote station having low-noise amplifier shared for uplink and downlink operations and wired relay method using the same

HWANG SEONG-TAEK

Method and apparatus for setting a lip region for lip reading

CHO JAE-HUN

Method and apparatus for time synchronization using GPS information in communication system

HAN SHUANGFENG

Method of allocating transmission power based on symbol error rate for orthogonal space-time block codes in a distributed wireless communication system

LEE JAE-HOON

Method and apparatus for scheduling in cellular system using cable relay station

KIM BYUNG-JIK

Apparatus and method for increasing cell capacity through optional signal combining between relay stations in a cellular system using wired relay stations

SONG KI-UK

Scheduling method in a cellular system using wired relay station