Efficient single event upset-tolerant FIR filter design based on residue number for OBP satellite communication systems

Cosmic radiation has several effects on the On-Board Processing (OBP) platform in satellite communications systems, and Single Event Upsets (SEUs) are one of its most important effects. In order to protect the Finite Impulse Response (FIR) filters against SEU, this paper proposes a novel Residue Number (RN)-based method. The proposed method applies the transpose form of the FIR filter to avoid the fault missing caused by SEU on shift registers. It also adjusts the input intelligently to avoid the fault missing caused by SEU on the filter coefficients. After all the fault missing events are avoided, the modulus can be minimised to achieve the minimum overhead. Theoretical analysis and simulation results show that the noise introduced by the input adjustment is negligible. Fault injection shows that the fault missing rate of the proposed method is zero. Finally, FPGA implementation shows that the overhead of the proposed method is approximately 75% of Triple Modular Redundancy, and is only 1%-2% higher than that of the traditional RN-based design.