WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 12, 2016
Modified Matched Signal Transform for Parameter Estimation of Spread Spectrum Stretch Signal
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Abstract: The spread spectrum stretch (S-cubed) is a kind of hybrid signal which has the advantages of the expansion and wide instantaneous bandwidth, proved to be the potential option for low probability of intercept (LPI) radar and stealth communications. In this paper, the S-cubed model that superimposes a short, cyclically repeated, discrete phase code on linear frequency modulation (LFM) is presented. In order to extract the signal features, we formulate modified matched signal transform (MMST) and then propose a novel approach to estimate the parameters of S-cubed in MMST domain. Furthermore, the numerical simulation and parameter estimation robustness are also studied. The simulation results show that when signal to noise ratio (SNR) is -7dB, the probability of correct decision (PCD) of the chirp rate has reached 90%.
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Keywords: spread spectrum stretch (S-cubed), modified matched signal transform (MMST), parameter estimation
Pages: 102-110
WSEAS Transactions on Signal Processing, ISSN / E-ISSN: 1790-5052 / 2224-3488, Volume 12, 2016, Art. #13