function BER=countBER(X_Decode,X_bit,N)
[row_D,column_D]=size(X_Decode);
[row,column]=size(X_bit);
BER=0;
biterror=0;

    for i=1:row
        for j=1:N
            if X_Decode(i,j)~=X_bit(i,j)
                biterror=biterror+1;
            end
        end
    end
    BER=biterror/(row*N);