Electromagnetic disturbance evaluation using pulse duration distribution

Estimation of degradation in transmission quality of radio communications by using pulse duration distribution (PDD) of electromagnetic (EM) disturbance is discussed in this paper. An existing estimation method using amplitude probability distribution (APD) also gives an relation with bit error rate (BER) at decoder input, however, it is difficult to apply the relation to BER at decoder output, because the relation does not include any information about a time duration of EM disturbance though an error correcting capability depends on continuity error. On the other hand, the use of PDD makes it possible to include properties of time sequence of EM disturbance in BER estimation. The comparison between simulated BER with convolutional coding and Viterbi decoding under pulse burst disturbance and estimated BER from PDD and APD of the disturbance are presented.