Saturday, 17 August 2013

Code error detection and correction

Code error detection and correction

my message bit is 10011010 so code word for this is 0110 now the
codeword=011100101010
now suppose the error is in 10th bits and it becomes=011100101110 so
finding parity bits
p1=1+3+5+7+9+11=010111=even number of 1 therefore=0
p2=2+3+6+7+10+11=110111=1
p4=4+5+6+7=1001=0
p8=8+9+10+11+12=01110=1
so comparing with the message the parity is false for 4 and 8 position ie
4+8=12 but in face we have made errors in 10 bit so where have i made a
mistake PLEASE point me out

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