Reduction of the error floor of MSK by nonlinear frequency discriminator

Research output: Contribution to journalArticle

Abstract

We consider the error floor of binary frequency-shift keying (FSK) due to intersymbol interference in time-dispersive mobile radio channels, with a limiter-discriminator-integrator detector. The errors are caused by bursts in the instantaneous frequency. We propose and verify that a nonlinear frequency discriminator can achieve zero error floor for pure FSK by clipping off these bursts. For filtered FSK, the error floor is not completely removed, but strongly reduced - typically by one or two orders of magnitude. The tighter the filtering, the less effective this nonlinearity is. The nonlinear discriminator can also be used in conjunction with adaptive sampling.

Details

Authors
  • Andreas Molisch
  • R Petrovic
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • discriminators, dispersive channels, frequency shift keying, intersymbol interference, minimum shift keying, mobile radio, signal detection
Original languageEnglish
Pages (from-to)1101-1107
JournalIEEE Transactions on Wireless Communications
Volume2
Issue number5
Publication statusPublished - 2003
Publication categoryResearch
Peer-reviewedYes