DocumentCode :
891795
Title :
Modifying real convolutional codes for protecting digital filtering systems
Author :
Redinbo, Robert G. ; Zagar, Bernhard
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Davis, CA, USA
Volume :
39
Issue :
2
fYear :
1993
fDate :
3/1/1993 12:00:00 AM
Firstpage :
553
Lastpage :
564
Abstract :
A method is presented for protecting the overall realization of digital filters implemented with very dense high-speed electronic devices against both hard and soft errors at the data sample level using the error-detecting properties of real convolutional codes. The normal filter system is surrounded with parallel parity channels defined by a real systematic rate k/n convolutional code. Erroneous behavior is detected by comparing externally the calculated and regenerated parity samples. Significant complexity reductions are possible by modifying the code structure, without loss of error protection, yielding simplified parity channels with finite impulse response (FIR) structures with computational rates decimated by k . The code modification procedure is described. The code modification process has been automated in a computer algorithm. The effects of parity filter quantizations are analyzed and a bound on the mean-square error in the parity comparison is given
Keywords :
convolutional codes; digital filters; error detection codes; filtering and prediction theory; signal processing; FIR filters; code modification procedure; digital filtering systems; digital filters; error protection; error-detecting properties; finite impulse response; hard errors; mean-square error; parallel parity channels; parity filter quantizations; real convolutional codes; soft errors; Computer errors; Convolutional codes; Digital filters; Equations; Fault tolerance; Fault tolerant systems; Filtering; Finite impulse response filter; Protection; Transfer functions;
fLanguage :
English
Journal_Title :
Information Theory, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9448
Type :
jour
DOI :
10.1109/18.212285
Filename :
212285
Link To Document :
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