Multi-Variant Discrete Analysis of EMC of on-Board Radio Equipment with Use of Worst-Case Models

The technology for step-by-step computer diagnostics of EMC of radio equipment contained in a complex on-board system is developed. At the first stage, all potentially dangerous paths of interference propagation are identified with the use of the broadband analytical worst-case model developed within IEMCAP program; the model allows to calculate spurious couplings between antennas of radio equipment. At the second stage, refined worst-case models for the elements of potentially-dangerous interference propagation paths identified before (i.e., numerical models of frequency characteristics of spurious couplings, numerical or analytical models of emission spectra and susceptibility characteristics of the equipment) are developed; then EMC diagnostics is performed on the basis of the refined models. The final stage of the diagnostics is discrete nonlinear analysis of EMC, which is made with the help of the high order nonlinearity models and radio receivers' selectivity models; these models are obtained on the basis of the results of double-frequency testing of the receivers. The use of the developed technology makes it possible to achieve high computational efficiency of EMC diagnostics; this is demonstrated by way of the example of EMC diagnostics for on-board system containing a set of HF, VHF and UHF radio stations installed on the small-sized mobile object.