[Octave-cvsupdate] SF.net SVN: octave:[10891] trunk/octave-forge/main/comm

[<car...@us...>]

Revision: 10891
          http://octave.svn.sourceforge.net/octave/?rev=10891&view=rev
Author:   carandraug
Date:     2012-08-21 00:32:36 +0000 (Tue, 21 Aug 2012)
Log Message:
-----------
egolaydec: bug fix where the error flag was not given for more than 3 erroneous bits

Modified Paths:
--------------
    trunk/octave-forge/main/comm/NEWS
    trunk/octave-forge/main/comm/inst/egolaydec.m

Modified: trunk/octave-forge/main/comm/NEWS
===================================================================
--- trunk/octave-forge/main/comm/NEWS	2012-08-20 17:15:30 UTC (rev 10890)
+++ trunk/octave-forge/main/comm/NEWS	2012-08-21 00:32:36 UTC (rev 10891)
@@ -5,6 +5,10 @@
       istrellis
       poly2trellis
 
+ ** Fixed bug in `egolaydec' which gave an error when there were more
+    than the three allowed erroneous bits, rather than setting the
+    error flag.
+
 Summary of important user-visible changes for communications 1.1.1:
 -------------------------------------------------------------------
 

Modified: trunk/octave-forge/main/comm/inst/egolaydec.m
===================================================================
--- trunk/octave-forge/main/comm/inst/egolaydec.m	2012-08-20 17:15:30 UTC (rev 10890)
+++ trunk/octave-forge/main/comm/inst/egolaydec.m	2012-08-21 00:32:36 UTC (rev 10891)
@@ -14,7 +14,7 @@
 ## this program; if not, see <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn {Function File} {}  egolaydec (@var{R})
+## @deftypefn {Function File} {} egolaydec (@var{R})
 ## 
 ## Given @var{R}, the received Extended Golay code, this function tries to
 ## decode @var{R} using the Extended Golay code parity check matrix.
@@ -37,7 +37,7 @@
 ##
 ## @example
 ## @group
-##  M=[rand(10,12)>0.5]; 
+##  M=[rand(10,12)>0.5];
 ##  C1=egolayenc(M); 
 ##  C1(:,1)=mod(C1(:,1)+1,2)
 ##  C2=egolaydec(C1)
@@ -80,12 +80,13 @@
     S=mod(RR*H,2);
     wt=sum(S);
     done=0;
+    E=[S, zeros(1,12)];
     if (wt <= 3)
       E=[S, zeros(1,12)];
       done=1;
     else
       SP = mod(repmat(S,[12, 1])+P,2);
-      idx = find( sum(SP,2) <= 2 );    
+      idx = find( sum(SP,2) <= 2 );
       if ( idx )
         idx=idx(1); %pick first of matches.
         Ui=zeros(1,12); Ui(idx)=1;
@@ -118,9 +119,5 @@
 
   return;
 end
-%!
 %!assert(egolaydec([1 1 1 zeros(1,21)]),zeros(1,24))
 %!assert(egolaydec([1 0 1 zeros(1,20) 1]),zeros(1,24))
-%!
-
-

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