Research Article 
Anti-Detection Performance of Code-Hopping Direct Sequence Spread Spectrum System
Li Dezhi, Gu Xuemai and Guo Qing
Information Technology Journal, 2011, 10(7), 1325-1333.
Abstract
In wireless communications especially satellite communications, as blind detection technologies developing, traditional Direct Sequence Spread Spectrum (DSSS) system is no longer secure enough. Code-Hopping (CH) DSSS system is considered as an evolution for its dynamization. CH-DSSS system gets rid of periodical cycle characteristic with its variable and unpredictable spreading sequence. Therefore, CH-DSSS signal is harder to be detected unauthorized. Theoretical analysis and simulations are carried out on both signal parameters and data demodulation. Results indicate that the anti-detection performance of CH-DSSS system improves logarithmically as the number of hopping codes increases. Considering the limited code sequence resource, the performance curve is given, from which a cost-effective codes number could be chosen.
ASCI-ID: 28-1309
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