An adaptive phase equalizer for minimum phase SAW filters

T. B. Wilborn, V. Hegde, S. Pai, W. K. Jenkins

Research output: Contribution to journalArticlepeer-review

Abstract

Standing acoustic wave (SAW) filters are used in many types of digital receivers, a majority of which are wireless telephones. Most of these filters are designed to have a linear-phase response so that the transmitted pulse can pass through undisturbed while out-of-band noise and adjacent channels are rejected. If the linear-phase specification is removed, the potential exists for smaller and less expensive filters to replace their linear-phase counterparts. This paper describes one particular minimum-phase SAW filter which is suitable for use as the intermediate-frequency filter (IF) in a wideband spread-spectrum receiver. In order to correct for the phase nonlinearity of the SAW filter, a digital adaptive phase equalizer algorithm is proposed. The decision-directed algorithm (DDA) and constant modulus algorithm (CMA) are considered for automatic adjustment of the phase equalizer.

Original languageEnglish (US)
Pages (from-to)872-875
Number of pages4
JournalMidwest Symposium on Circuits and Systems
Volume2
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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