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D.10.2.9 errorRand
Procedure from librarydecodegb.lib (see decodegb_lib).
- Usage:
- errorRand(y, num, e); y is matrix, num,e are int
- y is a (code) word, - num is the number of errors, - e is an extension degree (if one wants values to be from GF(p^e)) - Return:
- corresponding received word
LIB "decodegb.lib"; //correct 2 errors in [7,3] 8-ary code RS code int t=2; int q=8; int n=7; int redun=4; ring r=(q,a),x,dp; matrix h_full=genMDSMat(n,a); matrix h=submat(h_full,1..redun,1..n); matrix g=dual_code(h); matrix x[1][3]=0,0,1,0; matrix y[1][7]=encode(x,g); //disturb with 2 random errors matrix rec[1][7]=errorRand(y,2,3); print(rec); ==> a3,a6,a2,a,0,0,1 print(rec-y); ==> a4,0,a5,0,0,0,0 |