The algorithm-based fault tolerance techniques have been proposed to obtain reliable results at very low hardware overhead. Even though 100% fault coverage can be theoretically obtained by using these techniques, the system performance, i.e., fault coverage and throughput, can be drastically reduced due to many practical problems, e.g., round-off errors. A novel algorithm-based fault tolerance scheme is proposed for fast Fourier transform (FFT) networks. It is shown that the proposed scheme achieves 100% fault coverage theoretically. An accurate measure of the fault coverage for FFT networks is provided by taking the round-off error into account. The proposed scheme is shown to provide concurrent error detection capability to FFT networks with low hardware overhead, high throughput, and high fault coverage.
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