Effect of pulse shaping filters on a fractional sampling OFDM system with subcarrier-based maximal ratio combining

Mamiko Inamori, Takashi Kawai, Tatsuya Kobayashi, Haruki Nishimura, Yukitoshi Sanada

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper, the effect of the impulse response of pulse shaping filters on a fractional sampling orthogonal frequency division multiplexing (FS OFDM) system is investigated. FS achieves path diversity with a single antenna through oversampling and subcarrier-based maximal ratio combining (MRC). Though the oversampling increases diversity order, correlation among noise components may deteriorate bit error rate (BER) performance. To clarify the relationship between the impulse response of the pulse shaping filter and the BER performance, five different pulse shaping filters are evaluated in the FS OFDM system. Numerical results of computer simulations show that the Frobenius norm of a whitening matrix corresponding to the pulse shaping filter has significant effect on the BER performance especially with a small numbers of subcarriers. It is also shown that metric adjustment based on the Frobenius norm improves BER performance of the coded FS OFDM system.

Original languageEnglish
Pages (from-to)1484-1494
Number of pages11
JournalIEICE Transactions on Communications
VolumeE92-B
Issue number5
DOIs
Publication statusPublished - 2009 May

Keywords

  • Diversity
  • Fractional sampling
  • OFDM
  • Pulse shaping filter

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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