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스펙트럼 효율 향상을 위한 전이중 통신 방식과 5G 후보 변조기술과의 결합시스템 설계

Combination System Design of 5G Candidate Modulation and Full Duplex Communication for the Spectrum Efficiency Enhancement

  • An, Changyoung (Department of Electronics Engineering, Chungbuk National University) ;
  • Ryu, Heung-Gyoon (Department of Electronics Engineering, Chungbuk National University)
  • 투고 : 2016.01.25
  • 심사 : 2016.04.04
  • 발행 : 2016.04.30

초록

본 논문에서는 스펙트럼 효율 향상을 위하여 5G(Generation) 후보 변조 기술을 사용하는 SSD(Simultaneous Single band Duplex) 시스템을 설계하고, 각 시스템의 성능을 평가하고 비교 분석한다. 특히, 제안하는 5G 이동통신을 위한 후보 변조기술을 사용하는 SSD 시스템에 HPA(High Power Amplifier) 비선형성을 고려하여 시뮬레이션을 수행한다. 시뮬레이션의 결과로 SSD-OFDM, SSD-UFMC, SSD-FBMC 시스템은 HPA 비선형성에 의해 성능 열화가 심화되었지만, 동일한 HPA 비선형 조건에서 각각 시스템은 서로 유사한 성능을 내었다. 즉, 각각의 변조기술은 유사한 PAPR(Peak to Average Power Ratio) 특성을 갖는다. 이러한 결과로, 자기간섭신호(self-interference)의 비선형 왜곡이 심화될 경우, 자기간섭 제거가 어렵다는 것을 확인할 수 있다. 즉, 제안하는 SSD 시스템에서 HPA 비선형에 의한 영향을 줄이기 위해 PAPR을 저감시키는 것이 중요하다.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

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