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AR# 11773

LogiCORE Viterbi Decoder v1.0 - Core Generator 3.1i Viterbi Decoder core fails to generate for large constraint lengths

Description

Keywords: FEC, decoder, forward error correction

For large Viterbi cores constraint length 9, Core Generator may fail and not generate the core do to memory issues.

Solution

For large Viterbi cores constraint length 9 the mx command needs to be increased from the current setting of 1024 to 2047

e.g. $JAVA_HOME/bin/jre" -mx2047m -ss4M -DLDLIBPATH="$LD_LIBRARY_PATH" -classpath "$CLASSPATH" com.xilinx.encore.coregen.main.Coregen -c $COREGEN -p /home/beth/CoregenRun -b large.xco or refer to (Xilinx Solution 9244) for more information on changing the coregen.bat file.


Please See (Xilinx Answer 29448) for a detailed list of LogiCORE Viterbi Decoder Release Notes and Known Issues.
AR# 11773
Date Created 06/12/2001
Last Updated 03/14/2008
Status Archive
Type General Article