Peak power reduction method using adaptive peak reduction signal level control for OFDM transmission systems

Shigeru Tomisato, Vlasaharu Hata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Future broadband mobile communication systems are necessary to achieve the bit rates of 100Mbit/s. Orthogonal Frequency Division Multiplexing (OFDM) transmission is an attractive technology because it can remove the influence of frequency selective fading in broad-band transmission by adding a suitable guard interval to each OFDM symbol. However, peak-to-average power ratio (PAPR) is very large in OFDM transmission. In this paper, we propose a new PAPR reduction method which can be applied even when unusable bands are inside the system band. In the proposed method, peak reduction signals are generated by iterative signal processing only in the usable frequency band, and filtering to remove out-of-band components of the peak reduction signals is incorporated into the iterative signal processing. The results of computer simulation show that the proposed method can effectively reduce peak power without expanding the spectrum both outside the system band and into unusable bands inside the system band. By using the proposed method, the broadband mobile communication system with low peak power and high flexibility of frequency band use can be realized.

Original languageEnglish
Pages (from-to)1897-1902
Number of pages6
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE88-A
Issue number7
DOIs
Publication statusPublished - Jul 2005

Fingerprint

Power Method
Level control
Reduction Method
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
Mobile telecommunication systems
Frequency bands
Signal processing
Frequency selective fading
Broadband
Peak-to-average Power Ratio (PAPR)
Mobile Communication
Mobile Systems
Communication Systems
Signal Processing
Computer simulation
Fading
Computer Simulation
Filtering
Flexibility

Keywords

  • Iterative signal processing
  • Mobile radio communications
  • OFDM transmission
  • PAPR

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Hardware and Architecture
  • Information Systems

Cite this

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AB - Future broadband mobile communication systems are necessary to achieve the bit rates of 100Mbit/s. Orthogonal Frequency Division Multiplexing (OFDM) transmission is an attractive technology because it can remove the influence of frequency selective fading in broad-band transmission by adding a suitable guard interval to each OFDM symbol. However, peak-to-average power ratio (PAPR) is very large in OFDM transmission. In this paper, we propose a new PAPR reduction method which can be applied even when unusable bands are inside the system band. In the proposed method, peak reduction signals are generated by iterative signal processing only in the usable frequency band, and filtering to remove out-of-band components of the peak reduction signals is incorporated into the iterative signal processing. The results of computer simulation show that the proposed method can effectively reduce peak power without expanding the spectrum both outside the system band and into unusable bands inside the system band. By using the proposed method, the broadband mobile communication system with low peak power and high flexibility of frequency band use can be realized.

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