A.=SUM(A1:A4)
B.=A1+A2+A3+A4
C.=SUM(A1+A2:A3+A4)
D.=SUM(A1,A2,A3,A4)
考察一个(8,4)码C,它的校验位a5,a6,a7,a8满足下列方程:
其中a1,a2,a3,a4为信息位。求出这个码的一致校验矩阵。证明
A.Abis/A1/A2/A8/A9/A11/A12/A16/A17/A1P/A2P
B.Abis/A2/A3/A8/A9/A10/A11/A13/A16/A1P/A2P
C.Abis/A1/A2/A7/A9/A11/A12/A16/A17/A1P/A2P
D.Abis/A3/A7/A8/A9/A10/A11/A12/A13/A16/A1P/A2P