A high reliability on-board parallel system based on multiple DSPs

Data volumes produced by various space missions have increased significantly, creating an urgent need for on-board systems with higher performance and reliability. A “2 parallel + 1 standby” system based on multiple DSPs is proposed in this paper. This system consists of three DSPs and four FPGAs. Two DSPs work in parallel and the rest one is standby. The standby DSP replaces the fault DSP when an unrecoverable error is detected by radiation hardening modules. We applied a 2048-point FFT on this system to evaluate the performance. Then we injected some errors into the system and repeated the FFT application. The experimental results show that the system reaches a speedup of 1.63 and could recover from errors in a short time.