function?[?output?]?=?crc_add（?input?crc_no?）
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%??written?by?Wang?Meifang?on?24th?April?2008
%???Email:?mflltt@126.com
%??the?function?is?proposed?for?adding?crc?bits?to?the?input?sequence

%??input:?????the?input?information?bits?a?column?vector
%??crc_no:????the?number?of?the?adding?crc?bits?such?as?38121624
%??output:????the?output?information+crc?bits?a?column?vector
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?the?length?of?input
k?=?size（input2）;?
generator?=?zeros（1crc_no+1）;
output?=?zeros（1k+crc_no）;

switch??crc_no
case???3
????generator?=?[1?0?1?1];
case???8
????generator?=?[1?1?0?0?1?1?0?1?1];?%D^8+D^7+D^4+D^3+D+1
case???12
????generator?=?[1?1?0?0?0?0?0?0?0?1?1?1?1];?%D^12+D^11+D^3+D^2+D+1
case???16
????generator?=?[1?0?0?0?1?0?0?0?0?0?0?1?0?0?0?0?1];?%D^16+D^12+D^5+1
case???24
????generator?=?[1?1?0?0?0?0?0?0?0?0?0?0?0?0?0?0?0?0?1?1?0?0?0?1?1];?%D^24+D^23+d^6+D^5+D+1
otherwise
????fprintf（‘\nPlease?the?number?of?crc?bits?should?be?8?12?16?24\n‘）;
end

output（1:k）=input;
for?ii?=?1:k
????if（output（1）?==?1）
????????output（1:crc_no+1）?=?mod（（output（1:crc_no+1）+generator）2）;
????end
????output?=?[output（2:end）?output（1）];
end

output?=?[input?output（1:crc_no）];

????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1286??2008-04-24?13:14??CRC\crc_add.m

?????文件???????1429??2008-04-24?13:14??CRC\crc_check.m

?????文件???????1524??2007-04-11?10:38??CRC\CRC算法原理與實現(xiàn)代碼-c.txt

?????文件????????232??2008-04-24?13:14??CRC\test.m

?????目錄??????????0??2008-04-24?13:14??CRC

-----------?---------??----------?-----??----

?????????????????4471????????????????????5