SUMMARY
During last time noticed a trend to the implementation radio electronic systems (RES) for various purposes with a spread spectrum signals. For contraction RES with aggregated signals, wideband and noise-like signals very often utilized radio emission with chirp signals. The research some issues of determining the parameters of such signals are not solved yet for the present time. The author suggested a decisive rule of the algorithm measurement average frequency for a discrete model of an autocorrelation receiver with quadrature processing. In the article also considers options for reducing the error in its determination, which is confirmed by the results of the experiment.