Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design and Performance Analysis of Multicarrier 16QAM System in Simulcast Fading Channel

동시전송 감쇠 채널에서 다중반송파 16QAM 시스템의 설계 및 성능분석

  • Kim, Gyeong-Deok (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University) ;
  • Lee, Chang-Jae (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University) ;
  • Hwang, Seong-Hyeon (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University) ;
  • Choe, Hyeong-Jin (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University)
  • 김경덕 (성균관대학교 전기전자 및 컴퓨터공학부) ;
  • 이창재 (성균관대학교 전기전자 및 컴퓨터공학부) ;
  • 황성현 (성균관대학교 전기전자 및 컴퓨터공학부) ;
  • 최형진 (성균관대학교 전기전자 및 컴퓨터공학부)
  • Published : 2000.10.01
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Abstract

In this paper, we design the nonoverlapping multicarrier modulation (MCM) system for high rate paging system and evaluate the Performance by computer simulation. In conventional paging system, FSK was usually used, but we select QAM for high bandwidth efficiency. Transmitter structure adopts that of 4-16QAM of the iDEN$\^$TM/ and receiver consists of symbol timing recovery, carrier recovery and automatic gain control. In addition, pilot symbol aided modulation (PSAM) which can overcome the simulcast fading channel is considered and we also propose the optimum pilot symbol pattern. Finally, we show the performance of the overall 4-16QAM system by computer simulation.

이 논문에서는 고속전송 무선호출 시스템을 위한 스펙트럼 비중첩형 다중반송파 변복조 시스템을 설계하고 모의수행을 통하여 시스템의 성능을 평가한다. 기존의 무선호출 시스템은 주로 FSK 변조 방식이었으나 차세대방식에서는 계속 채용되기 어려우므로 대역효율이 높아 고속전송에 유리한 QAM 방식을 채택한다. 송신단은 iDEN/sup TM/의 4-16QAM 구조를 채택하였으며, 복조 알고리즘은 자동이득제어, 반송파동기 및 심벌동기를 고려한다. 한편, 동시전송 감쇠 채널을 극복할 수 있는 파일럿 심벌 보상 기술에 대해 분석하고 최적 파일럿 심벌 구조를 새롭게 제안하며 마지막으로 전체 4-16QAM 시스템의 성능평가 결과를 제시하였다.

Keywords

References

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