Effects of Single-tone Spurious Responses on Signals in ESM Receivers

摘要

This article presents the effects of spurious responses in ESM receivers used to geo-locate threat emitters. These spurs contaminate the measured values of phase and frequency of detected signals in the receivers, beyond the effect of receiver noise, causing errors in geo-location of emitters. In some cases the spurious responses change in frequency as the detected signals change in frequency; the spur frequency sometimes will cross the true detected signal frequency generating a crossing spur.