Earticle

초록

영어

A major drawback of Orthogonal Frequency Division Multiplexing (OFDM) system is high peak-to-average power ratio (PAPR) of the transmitted signal which introduces inevitable non-linear distortion in the transmission due to the amplifier non-linear property. This causes both in-band distortion and out of band spectrum re-growth. A polynomial based pre-distortion is estimated using the non-linear and inverse non-linear polynomial achieved through the Least Square Error (LSE) method. A new technique of PAPR reduction called ‘Phase Realignment’ (PR) is proposed which has a optimal effect in improving the BER performance as well as considerable reduction in the PAPR. In this paper we used the PR method along with the ‘Peak Clipping’ (PC) method is used before the pre-distortion to remove the high peak present in the non constant amplitude of the OFDM signal responsible to drive the amplifier in near saturation region for better performance of the system.

목차

ABSTRACT
 1. Introduction
 2. OFDM System Model
 3. Proposed Scheme
  3.1. LS Estimation of Non-linearity
  3.2. Pre-distorter
  3.3. Phase Realignment (PR)
  3.4. Active Constellation Extension (ACE)
 4. Performance Result
 5. Conclusions
 Reference

키워드

저자

• Robin Shrestha [ School of Information and Telecommunication Engineering, Korea Aerospace University ]
• Myung Hwan Seo [ 서명환 | School of Information and Telecommunication Engineering, Korea Aerospace University ]
• Gyeong Wan Go [ 고경완 | School of Information and Telecommunication Engineering, Korea Aerospace University ]
• Byung Seub Lee [ 이병섭 | School of Information and Telecommunication Engineering, Korea Aerospace University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국위성정보통신학회논문지 [Journal of Satellite, Information and Communications]

• 간기

  계간

• pISSN

  2384-3853

• 수록기간

  2006~2017

• 십진분류

  KDC 567 DDC 629