2023_programme: Adaptive Self-interference Cancellation for Full-duplex Underwater Acoustic Communications using Coded OFDM

• Session: 19. Underwater Communications and Networking
  Organiser(s): Charalampos Tsimenidis, Paul Mitchell and Konstantinos Pelekanakis
• Lecture: Adaptive Self-interference Cancellation for Full-duplex Underwater Acoustic Communications using Coded OFDM [invited]
  Paper ID: 2071
  Author(s): Tsimenidis Charalampos
  Presenter: Tsimenidis Charalampos
  Abstract: Presently, most underwater acoustic communications (UAC) systems operate using the half-duplex mode. Due to the limited available acoustic bandwidth and transceiver front-end saturation induced by overlapping transducer and hydrophone frequency responses, the transmission and reception need to be separated in time. This in turn leads to inefficient use of time-frequency resources and increased latency. This paper considers an UAC system with in-band full-duplex operation using adaptive cancellation techniques that consider power amplifier non-linearity to remove self-interference (SI). Furthermore, the proposed system utilizes quasi-cyclic low-density parity check codes (QC-LDPC), quadrature phase shift keying (QPSK) modulation and orthogonal frequency division multiplexing (OFDM) to overcome noise and multipath impairments. The performance is evaluated by simulation and using experimental data acquired during sea trials in the North Sea, UK, and demonstrates successful detection of remote transmissions in the presence of SI, which is attenuated by over 90 dB after cancellation.
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• Corresponding author: Prof Charalampos Tsimenidis
  Affiliation: Nottingham Trent University
  Country: United Kingdom
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