Fault Tolerant Parallel Filters Based on Error Correction Codes - 2015
Digital filters are widely employed in signal processing and communication systems. In some cases, the reliability of these systems is crucial, and fault tolerant filter implementations are required. Over the years, several techniques that exploit the filters' structure and properties to realize fault tolerance are proposed. As technology scales, it allows additional complex systems that incorporate many filters. In those complex systems, it's common that some of the filters operate in parallel, for example, by applying the same filter to different input signals. Recently, a easy technique that exploits the presence of parallel filters to attain fault tolerance has been presented. In this temporary, that concept is generalized to indicate that parallel filters can be protected using error correction codes (ECCs) in which each filter is the equivalent of a small amount in a very traditional ECC. This new theme allows more efficient protection when the quantity of parallel filters is massive. The technique is evaluated using a case study of parallel finite impulse response filters showing the effectiveness in terms of protection and implementation price.
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