Abstract
Jammer excision enhances the interference immunity in direct sequence spread spectrum (DSSS) communications. We propose an instantaneous frequency (IF) estimation method for a jammer composed of chirps, that uses evolutionary spectrum and Hough transform. The estimation requires no parametric representation of the IF and provides a correction by means of dechirping and low-pass filtering. Synthesis of the multicomponent jammer and its excision from the received signal is made possible with excellent results. Localized processing, linearization of the IF estimate, recursive correction, and no problems due to cross-terms in the time-frequency distribution or in the matching of parametric models make the proposed procedure efficient and practical. The performance of the IF estimation and its application in DSSS communications are illustrated.
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.
