Asynchronous Chirp Slope Keying for Underwater Acoustic Communication

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ID: 273174
2021
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Abstract
We propose an asynchronous acoustic chirp slope keying to map short bit sequences on single or multiple bands without preamble or error correction coding on the physical layer. We introduce a symbol detection scheme in the demodulator that uses the superposed matched filter results of up and down chirp references to estimate the symbol timing, which removes the requirement of a preamble for symbol synchronization. Details of the implementation are disclosed and discussed, and the performance is verified in a pool measurement on laboratory scale, as well as the simulation for a channel containing Rayleigh fading and Additive White Gaussian Noise. For time-bandwidth products (TB) of 50 in single band mode, a raw data rate of 100 bit/s is simulated to achieve bit error rates (BER) below 0.001 for signal-to-noise ratios above −6 dB. In dual-band mode, for TB of 25 and a data rate of 200 bit/s, the same bit error level was achieved for signal-to-noise ratios above 0 dB. The simulated packet error rates (PER) follow the general behavior of the BER, but with a higher error probability, which increases with the length of bits in each packet.
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Authors Dominik Jan Schott;Andrea Gabbrielli;Wenxin Xiong;Georg Fischer;Fabian Höflinger;Johannes Wendeberg;Christian Schindelhauer;Stefan Johann Rupitsch;Schott, Dominik Jan;Gabbrielli, Andrea;Xiong, Wenxin;Fischer, Georg;Höflinger, Fabian;Wendeberg, Johannes;Schindelhauer, Christian;Rupitsch, Stefan Johann;
Journal sensors
Year 2021
DOI 10.3390/s21093282
URL
https://doi.org/10.3390/s21093282
Keywords
wireless communication digital signal processing underwater communication acoustic communication ultrasound acoustics chirp modulation chirp slope keying chirp spread spectrum

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