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Parallel implementation of a soft output sphere decoder
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0001-6630-243X
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0003-2298-6774
2005 (English)In: 2005 39th Asilomar Conference on Signals, Systems and Computers, NEW YORK: IEEE , 2005, 581-585 p.Conference paper, Published paper (Refereed)
Abstract [en]

Transmission at rates close to capacity over fading multiple antenna channels can be achieved by concatenating inner space-time block codes and powerful outer codes such as turbo or LDPC codes. However, in such systems, computation of the required soft information, or log-likelihood ratios (LLR), for the bits transmitted over the channel is rather complex and some form of approximations are typically used. Herein, we show how the complexity of computing the max-log approximation of the LLR can be reduced by computing all LLR values simultaneously using a parallel sphere decoder implementation.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2005. 581-585 p.
Keyword [en]
fading, space-time block codes, LDPC codes, turbo codes, log-likelihood ratios (LLR), sphere decoder
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-34965DOI: 10.1109/ACSSC.2005.1599816ISI: 000238142000111Scopus ID: 2-s2.0-33847690772OAI: oai:DiVA.org:kth-34965DiVA: diva2:427163
Conference
39th Asilomar Conference on Signals, Systems and Computers Pacific Grove, CA, OCT 30-NOV 02, 2005
Note
QC 20110627Available from: 2011-06-27 Created: 2011-06-17 Last updated: 2012-01-23Bibliographically approved

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Jaldén, JoakimOttersten, Björn

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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