학술논문
A Low Complexity Turbo MMSE Equalization Method for OTFS Underwater Acoustic Communications
Document Type
Conference
Source
2023 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC) Signal Processing, Communications and Computing (ICSPCC), 2023 IEEE International Conference on. :1-5 Nov, 2023
Subject
Language
ISSN
2837-116X
Abstract
This paper provides a low complexity turbo iterative equalization algorithm for OTFS underwater acoustic communication systems. The method defines the influence range of symbols in the delay-doppler domain, performs symbol-by-symbol MMSE equalization and LDPC soft decoding. By exchanging soft information between equalizer and decoder, turbo iteration equalization is realized. It uses iterative structure to further enhance the performance by using the information of the previous iteration. In addition, based on block iterative matrix inversion, the direct inversion of large matrices is avoided. Simulation results show that the proposed method can significantly reduce the computational complexity while losing less performance.