DocumentCode :
2563855
Title :
Outage-based LDPC code design for SC/MMSE turbo-equalization
Author :
Wohlgenannt, Rainer ; Kansanen, Kimmo ; Tujkovic, Djordje ; Matsumoto, Tad
Author_Institution :
Austriamicrosystems AG, Premstaetten, Austria
Volume :
1
fYear :
2005
fDate :
30 May-1 June 2005
Firstpage :
505
Abstract :
A semi-analytical EXIT chart analysis approach is presented to perform code design of low-density parity-check (LDPC) codes with a frequency-domain SC/MMSE turbo equalizer. The approach utilizes the equivalent channel assumption at the equalizer output to analytically compute the equalizer output mutual information. The analysis is used to compute the EXIT functions of the receiver for a sample set of random channel realizations. LDPC code design is then performed to match the channel code to the random convergence properties of the equalizer to obtain a desired outage probability. Substantial performance improvement is achieved with the code design compared to a standard regular LDPC code. Target block error probability is not reached, which is considered to be the result of some of the approximations made in the analysis and code design.
Keywords :
channel coding; channel estimation; equalisers; error statistics; least mean squares methods; parity check codes; turbo codes; EXIT functions; SC/MMSE turbo-equalization; block error probability; channel code; equalizer output mutual information; equivalent channel assumption; frequency-domain SC/MMSE turbo equalizer; low-density parity-check codes; outage probability; outage-based LDPC code design; random channel realizations; semi-analytical EXIT chart analysis; Code standards; Convergence; Decoding; Equalizers; Error probability; Frequency domain analysis; Information analysis; Mutual information; Parity check codes; Performance analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
ISSN :
1550-2252
Print_ISBN :
0-7803-8887-9
Type :
conf
DOI :
10.1109/VETECS.2005.1543342
Filename :
1543342
Link To Document :
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