[Anritsu]1. Technical Support for Protocol equipment - Protocol equipment as 3G/LTE/NR CAT and LTE/NR PCT - Classifying an issue as TE issue or UE issue - Debugging issues2. Test environment configuration for field issues using Anritsu protocol equipments3. Creating test scenario for field issues and prior technology[Innowireless]1. SW Development for LTE Small Cell - Development of SON(Self-Organizing Network) for LTE Small Cell using C++2. Quality Assuarance for LTE Small Cell(FDD and TDD) - SW Test and Verification - Acceptance Test and Field Test - Project Leader for client companies3. Question and Answer - Answer about questions of client companies using JIRA SW - Bug analysis about issue raised by client companies - Bug report about confirmed issues[Achievements during the Master's Degree]A. Implemented projects about signal processing for wireless communication systems.▪Development of DVB 2.0-based Convergence Multiplexing and Flexible Demodulation Technologies.▪Development of Security Technologies and Core Chip for Driver Assistance Systems using Cooperative Control Communication.▪Development of GSM Signal Generator and Advanced Measurement Algorithm. B. Proposed various algorithms for improving performance of signal processing.[Domestic Patent]▪The transmission and system using re-ordering OFDM symbol algorithm.▪The signal transmission method and system using Hybrid MIMO cooperative communication.▪The control system and method for OFDM based Basestation with cooperative communication.[SCIE(Science Citation Index Expanded) Paper]▪An Improved Low Complexity Detection Scheme in MIMO OFDM Systems▪Hybrid MIMO Cooperative Scheme for Improved Throughput in Wireless OFDM Systems▪An Advanced Cooperative Scheme in the Broadcasting and Cellular System[Conference Paper]▪A Cooperative Communication Technique for Improved Transmission Rate in OFDMA-Based System, ISI 2012▪An Improved Low Complexity MIMO-OFDM Detection Algorithm, ISI 2012▪The Study on the Adaptive Hybrid MIMO Cooperative Shceme in Wireless OFDM Systems, International Journal of Multimedia and Ubiquitous Engineering