Comparison of Zadoff-Chu Encoded Modulation Schemes in an Ultrasonic Local Positioning System

Murano, Santiago; Pérez, Mario; Ureña, J.; Bleakley, Chris J.; Marziani, Carlos De

doi:10.1109/ipin.2018.8533702

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Because of the properties of ZC sequences, its FFT results in another ZC sequence with similar properties. To allocate the Zadoff-Chu code in the appropriate band defined by the transducer response, each code bit has to be fed into the channels of the IFFT that correspond to the desired output frequencies, and the rest of the channel inputs should be filled with zeros [7].…”

Section: A Zadoff-chu Codesmentioning

confidence: 99%

“…The carriers are obtained like in the QPSK modulation. In the current study, two forms of frequency hopping were considered: Slow-FH and Fast-FH [7]. In Slow-FH, the entire ZC sequence is transmitted before changing the carrier.…”

Section: A Zadoff-chu Codesmentioning

confidence: 99%

“…These modulation schemes have already been evaluated on airborne indoor ultrasonic positioning systems [7], whereas Kasami sequences were also evaluated for underwater communication systems, but they were not compared to Zadoff-Chu [8].…”

Section: A Zadoff-chu Codesmentioning

confidence: 99%

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Doppler resilience evaluation of different encoding techniques for underwater acoustic ranging systems

Murano

Perez-Rubio

Aparicio

et al. 2019

2019 24th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

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Underwater acoustic communication or localization systems can be affected by the Doppler effect when the receiver or emitter is in motion. In those cases, the use of an a appropiate encoding/modulating scheme play a pivotal role in the time of arrival estimations, avoiding the need of complex auxiliary Doppler compensation algorithms. This paper presents a Doppler resilience evaluation of Zadoff-Chu based schemes, modulated by phase modulation (QPSK), Orthogonal Frequency Division Multiplexing (OFDM) and Frequency Hopping Spread Spectrum (FHSS) modulation schemes. They are also compared to traditional binary Kasami codes modulated by BPSK. An underwater acoustic propagation model has been used to assessed the aforementioned schemes, to which the Doppler effect modeling has been also incorporated.

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Section: A Zadoff-chu Codesmentioning

confidence: 99%

Section: A Zadoff-chu Codesmentioning

confidence: 99%