Performance of transmultiplexers based on oversampled filter banks under variable oversampling ratios

Stephan Weiss, Andrew Paul Millar, Robert Stewart, Malcolm Macleod

Research output: Contribution to conferencePaper

7 Citations (Scopus)

Abstract

In this paper, we explore the influence of oversampling on a filter bank based transmultiplexer, for which previous research has established oversampling as a useful mean to ease synchronisation. The effect of oversampling is assessed mainly in terms of inter-symbol interference due to synchronisation errors and due to the residual time-dispersive effect of the transmission medium after transmultiplexing. Both effects can be targetted by a fractionally spaced equaliser. Although the achievable minimum mean square error is lower for higher oversampling ratios, we show by example of a powerline communications channel that slow convergence of least mean square type adaptive equalisers prohibits the exploitation of this benefit. Together with considerations on bandwidth efficiency and peak-to-average power ratio, it is advantageous to keep the oversampling ratio as small as possible.
Original languageEnglish
Pages2181-2185
Number of pages5
Publication statusPublished - 23 Aug 2010
Event18th European Signal Processing Conference - Aalborg, Denmark
Duration: 23 Aug 201028 Aug 2010

Conference

Conference18th European Signal Processing Conference
CityAalborg, Denmark
Period23/08/1028/08/10

Keywords

  • transmultiplexer
  • filter banks
  • oversampling
  • performance
  • oversampled
  • variable oversampling ratios

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