Blind self-noise-free frequency detectors for a subclass of MSK-type signals

Predrag Spasojević, Costas N. Georghiades

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Frequency offset due to Doppler shift and/or oscillator instabilities degrade receiver performance. In this paper, a family of frequency detectors for frequency offset estimation and compensation in digital receivers is introduced. The proposed detectors are best suited for frequency offset compensation of a subclass of binary continuous phase modulation with h = l/2that includes modulation schemes with nonnegative frequency pulses. For the considered modulation schemes, the modulation-induced self-noise term is absent from the variance of the frequency estimate. The estimator is nondata- and nontiming-aided and its estimation range is either half or a quarter of the bit rate (R). With larger frequency offsets, the estimators that have a ± R/2estimation range introduce a frequency ambiguity of Rthat is of no relevance to the performance of a differential detection based receiver.

Original languageEnglish (US)
Pages (from-to)704-715
Number of pages12
JournalIEEE Transactions on Communications
Volume48
Issue number4
DOIs
StatePublished - Apr 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Digital receivers
  • Frequency acquisition
  • Frequency detectors
  • Satellite communication
  • Synchronization

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