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Method of code generation that minimizes error propagation

Patent image
NSA

A method of generating a code that minimizes error propagation by selecting integers m, n, mrl, and a range of fractions od, where m represents the number of bits in an unencoded sequence, where n represents the number of bits in an encoded sequence, where mrl represents the maximum run length of an encoded sequence, and where od represents a range of ones densities of an encoded sequence. Next, generating an encoding map M that maps each unencoded sequence to an n-bit encoded sequence that satisfies od and mrl. Next, generating a decoding map N that maps each n-bit sequence to an m-bit sequence. Next, determining an error-propagation score for M and N. Then, returning to the step of generating M if a user requires a lower error-propagation score.

Inventors: 
Mcadoo Jr., Leslie Newton; Evasius, Dean M.
Patent Number: 
Technical domain: 
Communications
FIle Date: 
2006-02-27
Grant Date: 
2010-03-09
Grant time: 
1,471 days
Grant time percentile rank: 
27
Claim count percentile rank: 
3
Citations percentile rank: 
2
'Cited by' percentile rank: 
1
Assignee: 
NATIONAL SECURITY AGENCY