Saturday, 10 August 2013

Why should we append zeros during CRC calculation?

Why should we append zeros during CRC calculation?

Say we have M as message bits , why do we need to append r-zeros to M
message bits before performing the division to obtain r-bit checksum. Why
don't we directly perform the division on the M message bits only (no
zeros appended) and append the r-bit checksum at the end before
transmission.

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