We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Real-Time Digital Self Interference Cancellation Method for In-Band Full-Duplex Underwater Acoustic Communication Based on Improved VSS-LMS Algorithm.
- Authors
Lu, Yinheng; Qiao, Gang; Yang, Chenlu; Zhao, Yunjiang; Yang, Guang; Li, Huizhe
- Abstract
Theoretically, the spectral efficiency of in-band full-duplex underwater acoustic communications (IBFD-UWAC) is twice that of a half-duplex one. However, the actual achievable spectral efficiency of IBFD-UWAC is determined by the performance of the self-interference cancellation (SIC). In addition, the hostile underwater environment poses a challenge to the tracking performance of the SIC due to its complexity and variability. In this paper, we propose a digital SIC method based on the improved variable step-size least mean square (IVSS-LMS) algorithm where we modify the step-size adjustment criterion in the classical LMS filter and establishes a nonlinear relationship with the Sigmoid function to control the step-size using the instantaneous state error, thus improving the robustness and tracking performance of IVSS-LMS. Hardware-in-loop simulation (HLS) based on Simulink ® platform verifies the real-time implementability and effectiveness of the proposed IVSS-LMS algorithm. Furthermore, the sea trial results show that the digital SIC method based on the proposed algorithm can be implemented in real-time and the convergence speed, and steady-state performance are significantly improved.
- Subjects
UNDERWATER acoustic communication; DIGITAL communications; MEAN square algorithms; ALGORITHMS; LEAST squares; SELF
- Publication
Remote Sensing, 2022, Vol 14, Issue 12, pN.PAG
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs14122924