Quantization loss for convolutional decoding in Rayleigh-fading channels

MRG Butler, AR Nix

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)
411 Downloads (Pure)


This letter presents a theoretical analysis (based on tight upper bounds on the error probability) of quantization loss with integer metrics used for convolutional decoding in the Rayleigh-fading channel. Optimum configurations with respect to the generalized cutoff rate criterion are established for 2-bit, 3-bit and 4-bit quantizers, and corresponding losses with both de facto industry-standard 1/2-rate and associated punctured 3/4-rate codes are evaluated. Assuming optimized thresholds, 4-bit metrics are shown to incur only a small quantization loss. However, results also indicate that the loss is sensitive to suboptimum threshold spacing.
Translated title of the contributionQuantization loss for convolutional decoding in Rayleigh-fading channels
Original languageEnglish
Pages (from-to)446 - 448
Number of pages3
JournalIEEE Communications Letters
Issue number9
Publication statusPublished - Sept 2003

Bibliographical note

Publisher: Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Rose publication type: Journal article

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  • convolutional codes
  • integer metrics
  • Rayleigh-fading channels
  • quantization


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