AN OVERVIEW OF FAULT TOLERANT FIR FILTERS USING ERROR CORRECTING CODES

Abstract

Filters are broadly used in dealing out with signal processing and communication systems. The filters so used are digital filters. In those systems, assurance to efficient operation of signal are insignificant and that is why needed implementation of fault tolerant filters. Over the duration, lots of techniques that make use of the filters structure and properties to achieve fault tolerance have been proposed. Enhancing technology make system more complex that include many filters. In those complex systems, it is frequent to have number of filters that functions in parallel. In parallel combination of filters there apply the same filter to different input signals. In recent times, a simple technique having the existence of parallel filters to accomplish fault tolerance has projected. In this brief, that idea is generalized to show that parallel filters can be protected using error correction codes (ECCs) in which each filter is the equivalent of a bit in a traditional ECC. This new scheme allows more efficient protection when the number of parallel filters is large. The technique is evaluated using a case study of parallel infinite impulse response filters showing the effectiveness in terms of protection and implementation cost.