ON-GOING RESEARCH

Design of CMOS Integrated Duplexer Module for In-band Full-Duplexer Radios (삼성전자)

Design of g electrical-balance duplelxer using CMOS technology which is suitable for in-band full-duplex radios (transceivers) for advanced 4G and 5G Communication Systems
Major design challenges are to achieve a sufficient isolation between receiver and transmitter paths, that is direct related to the effect of self-interference (SI). The self-interference cancellation (SIC) should be realized through various circuit techniques and architectural approaches.
Need to design a hybrid transformer to handle self-interference which is controllable through balance network.

Design of in-band full-duplex radios (transceivers) for advanced 4G and 5G Communication Systems
For a half-duplex architecture, it follows a frequency-division multiplexing (FDD) or a time-division multiplexing (TDD) such that a signal transmission and reception occur at the different frequency bands simultaneously or at the different time slots, respectively. On the other hands, in case of the full-duplex architecture, the signal can be transmitted or received simultaneously by sharing frequency bands and time slot. Consequently, the spectral efficiency can be doubled and the data-rate can be increased efficiently.
Major design challenges are to achieve a sufficient isolation between receiver and transmitter paths, that is direct related to the effect of self-interference (SI). The self-interference cancellation (SIC) should be realized through various circuit techniques and architectural approaches.

Design of RF system for wireless datalink for multi-purpose annumition for Battle Tank
This is mainly for enhancing accuracy and loading speed of annumition through in-battle shell communication. Wireless datalink solution provides more accurate and reliable process prior to shooting munition, setting by wireless RF interface
Major design challenge is that wireless data link should be installed without changing existing automatic munition loading system. Initially, RF system design is in progress through system link budget

Design of RF system including microwave package models, RF modules and integrated circuits
Build the design specifications of packages, modules and IC based on system verification simulation.
Analysis of RF systems through the system link budget

Design of CMOS Transceivers for 5G Communication Systems (Frequency Range: 6 ~ 30 GHz)
Have investigated architectures for mmWave frequency bands.
Have focused on low cost circuit techniques for reconfigurable receiver architectures