Effects of the 3rd Harmonic Component on False Negatives in a Time Diverse Triple Modular Redundant System Under Reverberation Conditions

In this paper, time diversity is used as an EM resilience technique in a Triple Modular Redundant (TMR) communication channel that is subjected to a multi-harmonic electromagnetic disturbance under reverberation conditions. The study shows that time diversity proves to be quite an effective measure in order to incorporate fault tolerance in the system. However, when compared to the single frequency case for which time diversity eliminates all potential false negatives, the multi-harmonic disturbance tends to have a slight percentage of false negatives, especially at high field strengths. Together with reverberation simulation results, a theoretical explanation is also presented that explains this phenomenon of multi-harmonic Electromagnetic Interference (EMI) induced false negatives.