17HF1600, Development of 5G Mobile Communication Technologies for Hyper-connected smart services,
Chung Hyun Kyu
Abstract
본 논문에서는 mmWave를 활용한 OFDM 방식의 고속열차 통신 시스템에서 발생하는 도플러 주파수를 효율적으로 추정하고 보상하는 방법을 제안하였다. 파일럿 신호를 이용한 correlation 방식의 주파수 옵셋 추정 알고리즘에서, 상향링크의 새로운 M-USCH 채널과 M-UCCH 신호를 결합하면 M-USCH의 기존 구조를 사용한 방법에 비해 성능이 개선됨을 확인하였다. 또한 M-UCCH 신호를 이용한 주파수 옵셋 보상의 1-stage 방법은 하드웨어 복잡도가 훨씬 적으며 M-USCH 채널을 효율적으로 설계할 수 있도록 도와줌으로써 전송 성능을 향상시킬 수가 있다.
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