Title :
A novel time-frequency exciser in spread spectrum communications for chirp-like interference
Author :
Bultan, Aykut ; Akansu, Ali N.
Author_Institution :
Electr. & Comput. Eng. Dept., New Jersey Center for Multimedia Res., Newark, NJ, USA
Abstract :
A novel time-frequency exciser is developed for the removal of chirp-like interferences in direct sequence spread spectrum (DSSS) communications. The chirplet decomposition iteratively expands signals in terms of time-frequency localized waveforms. The interference signal components are highly correlated with chirplets, and are represented by a few of the highest energy components of the decomposition. These components are excised from the received signal, and an excised signal goes through a detector for a decision. The proposed time-frequency exciser outperforms the conventional Fourier transform based excisers for chirp-like interference classes
Keywords :
correlation methods; interference suppression; pseudonoise codes; radiofrequency interference; signal detection; spread spectrum communication; time-frequency analysis; DS-SS communications; Fourier transform based excisers; chirp-like interference; chirplet decomposition; correlated interference signal components; detector; direct sequence spread spectrum; energy components; excised signal; received signal; spread spectrum communications; time-frequency exciser; time-frequency localized waveforms; Bandwidth; Chirp; Detectors; Fourier transforms; Interference; Jamming; Multiaccess communication; Spread spectrum communication; Time frequency analysis; Transmitters;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679561
