A New Joint Coding and Modulation Scheme for Channels with Clipping

I. Vaughan L Clarkson*, Iain B. Collings

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A major limitation in any high-performance digital communication system is the linearity region of the transmitting amplifier. Nonlinearities typically lead to signal clipping. Efficient communication in such conditions requires maintaining a low peak-to-average power ratio (PAR) in the transmitted signal while achieving a high throughput of data. Excessive PAR leads either to frequent clipping or to inadequate resolution in the analog-to-digital or digital-to-analog converters. Currently proposed signaling schemes for future generation wireless communications suffer from a high PAR. This paper presents a new signaling scheme for channels with clipping which achieves a PAR as low as 3. For a given linear range in the transmitter's digital-to-analog converter, this scheme achieves a lower bit-error rate than existing multicarrier schemes, owing to increased separation between constellation points. We present the theoretical basis for this new scheme, approximations for the expected bit-error rate, and simulation results.

Original languageEnglish
Pages (from-to)223-241
Number of pages19
JournalDigital Signal Processing: A Review Journal
Volume12
Issue number2-3
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Channel coding
  • Lattice codes
  • Multicarrier modulation
  • Peak-to-average ratio

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