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Jammer Excision in Spread Spectrum Communications via Discrete Evolutionary Transform
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chaparro, Luis F. Suleesathira, Raungrong |
| Copyright Year | 2001 |
| Abstract | In this paper, we propose time-frequency jammer excision techniques for direct sequence spread spectrum communications. One method is based on the estimation of the instantaneous frequency (IF) of each of the chirp jammer components using a combination of the discrete evolutionary and the Hough transforms. The second method is based in Wiener masking, and reduces the interference in a mean-square fashion. In the first method, the jammer is synthesized and subtracted from the baseband received signal, while in the second method a mean-square estimate of the message is obtained. The IF-based method applies equally well to multi-component chirp jammers with constant or time-varying amplitudes, and instantaneous frequencies not necessarily parametrically modeled. A statistical analysis of this method is developed based on the signal to interference and noise ratio. We will show that the Wiener masking method is a general method requiring the spectrum of the spreading function. The two methods are illustrated by simulations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.emo.org.tr/ekler/b4c6c207e1e59c5_ek.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
