Journal
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
Volume 23, Issue 2, Pages 384-387Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVLSI.2014.2308322
Keywords
Error correction codes (ECCs); filters; soft errors
Funding
- China's 863 Plan Program Research on the Key Technology for the Base Band Signal Processing for Onboard Payload
- Sino-Japan Joint Fund Key Technique Research for GSS Integrated Mobile Satellite Communications
- Tsinghua University Initiative Scientific Research Program [2010THZ03]
- National Basic Research Program of China [2012CB316000]
- Spanish Ministry of Science and Education [AYA2009-13300-C03]
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Digital filters are widely used in signal processing and communication systems. In some cases, the reliability of those systems is critical, and fault tolerant filter implementations are needed. Over the years, many techniques that exploit the filters' structure and properties to achieve fault tolerance have been proposed. As technology scales, it enables more complex systems that incorporate many filters. In those complex systems, it is common that some of the filters operate in parallel, for example, by applying the same filter to different input signals. Recently, a simple technique that exploits the presence of parallel filters to achieve fault tolerance has been presented. 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 finite impulse response filters showing the effectiveness in terms of protection and implementation cost.
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