Abstract
Continuous Active Sonar (CAS) has some advantages over conventional pulse active sonar, such as larger time-bandwidth product, longer correlation durations, continuous detection and tracking. Recently two kinds of coded-modulated pulse trains were designed as the transmitted waveforms for CAS. The linear frequency-modulated (LFM) waveform is modulated via the Costas sequence to form the LFM-Costas pulse train. Another coded-modulated pulse train is composed of the generalized sinusoidal frequency-modulated (GSFM) waveform. This paper aims at designing a new coded-modulated pulse train by modulating the GSFM waveform with the Costas sequence. By comparison with GSFM and LFM-Costas pulse trains, the simulation results show that the new GSFM-Costas pulse train can provide better detection performance including thumbtack ambiguity function shape and low cross-correlation property, as well as the better performance of reverberation suppression.
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Acknowledgements
The authors gratefully acknowledge funding support from School Scientific Research Program of NUDT (nos. JC15-11-01) and National Defense Science and Technology Fund (nos. 3101287).
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Guan, C., Zhou, Z., Wu, D., Zeng, X. (2020). A New Coded-Modulated Pulse Train for Continuous Active Sonar. In: Liang, Q., Wang, W., Liu, X., Na, Z., Jia, M., Zhang, B. (eds) Communications, Signal Processing, and Systems. CSPS 2019. Lecture Notes in Electrical Engineering, vol 571. Springer, Singapore. https://doi.org/10.1007/978-981-13-9409-6_282
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DOI: https://doi.org/10.1007/978-981-13-9409-6_282
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