Reduced length redundancy adaptive protection for the cascaded integrator-comb interpolation filter on FPGA

Abstract

Cascaded Integrator-Comb filters are a popular choice of filter for use as an interpolator in FPGAs due to their efficient multiplierless design, such as within an on-board satellite communication module. Electronics in space have the problem of being highly susceptible to cosmic radiation, due to the lack of magnetosphere and therefore require some form of protection from Single Event Upsets (SEUs). General techniques exist such as Dual Modular Redundancy (DMR) and Triple Modular Redundancy (TMR), but these may not be desirable due to their large area overhead and power consumption cost. Proposed is a reduced length redundancy technique that offers variable protection for varying power and area resources that could be used with partial reconfiguration to provide dynamically adaptive SEU protection depending on the current environment.