Abstract
In ESM receivers, Pulse Repetition Interval (PRI) estimation is an important part of emitter identification and tracking. Under poor SNR conditions, some of the received pulses are less likely to be detected causing a significant error in PRI type and period estimation. The same effect is observed if the receiver detects the multipath reflection based spurious pulses inducing false PRIs. This paper proposes a novel algorithm for diagnosing the presence of missing or false periods in estimated PRI stream. The proposed algorithm calibrates the PRI modulation detection thresholds and re-aligns the estimated PRI vector by removal of the missing/spurious periods. The algorithm is evaluated against different input configurations of fixed, staggered, slide and jittered PRIs. It is investigated through simulations that the PRI modulation type is highly effected by incorporation of false PRIs. The estimation performance of the proposed algorithm is evaluated by Monte-Carlo iterations. It is concluded through simulations that if the PRI estimation thresholds are calibrated for detection and removal of the missing/spurious pulses, the estimation inaccuracies can effectively be compensated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
