Parallel implementation of a soft output sphere decoder
2005 (English)In: 2005 39th Asilomar Conference on Signals, Systems and Computers, NEW YORK: IEEE , 2005, 581-585 p.Conference paper (Refereed)
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.
fading, space-time block codes, LDPC codes, turbo codes, log-likelihood ratios (LLR), sphere decoder
IdentifiersURN: urn:nbn:se:kth:diva-34965DOI: 10.1109/ACSSC.2005.1599816ISI: 000238142000111ScopusID: 2-s2.0-33847690772OAI: oai:DiVA.org:kth-34965DiVA: diva2:427163
39th Asilomar Conference on Signals, Systems and Computers Pacific Grove, CA, OCT 30-NOV 02, 2005
QC 201106272011-06-272011-06-172012-01-23Bibliographically approved