Fault Tolerant Parallel Filters Based on Error Correction Codes - 2014
Digital filters are widely employed in signal processing and communication systems. In some cases, the reliability of these systems is essential, and fault tolerant filter implementations are required. Over the years, many techniques that exploit the filters' structure and properties to attain fault tolerance are proposed. As technology scales, it allows additional advanced systems that incorporate several filters. In those complex systems, it is common that a number of the filters operate in parallel, as an example, by applying the identical filter to completely different input signals. Recently, a straightforward technique that exploits the presence of parallel filters to attain fault tolerance has been presented. In this brief, that idea is generalized to show that parallel filters will be protected using error correction codes (ECCs) in that each filter is the equivalent of a bit in an exceedingly ancient ECC. This new scheme permits a lot of economical protection when the number of parallel filters is giant. The technique is evaluated employing a case study of parallel finite impulse response filters showing the effectiveness in terms of protection and implementation cost.
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