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FREQUENCY OFFSET EFFECT ON THE PERFORMANCE OF CHAOTIC CHIRP SPREAD SPECTRUM SYSTEM | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 3, 2011, Pages 38-46 | ||
| Authors | ||
| Mohamed. S. Haji Ali; Maan M. Shaker; Thair A. Salih | ||
| Abstract | ||
| Recently there has been a great deal of interest in the application of spread spectrum systems. However, the performance of the robust spread spectrum system detector depends on the selection of the spreading signal. This paper is intended to provide the basic concepts of a proposed spread spectrum system based on two features. The first one implies the use of the spread spectrum based on Rossler chaotic sequence to minimize interference caused by other systems to secure the information transmission. The second concept clarifies the use of a chirp signal to achieve high data transmission rate within a limited bandwidth. Furthermore, performance of the proposed system is simulated in the presence of AWGN as well as frequency offset is applied to notice and limit its effect. Bit error rate (BER) is computed to evaluate the system confidentiality | ||
| Keywords | ||
| chirp; Chaotic; QPSK; spread spectrum | ||
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