Sparse Prior-Guided Deep Learning for OTFS Channel Estimation

Xiaoqi Zhang1; Chang Liu2; Weijie Yuan3; J. Andrew Zhang1; Derrick Wing Kwan Ng4

2024

10.1109/TVT.2024.3450012

IEEE Transactions on Vehicular Technology   影响因子和分区

1939-9359

In this paper, we propose a deep residual shrinkage neural network (DRSNN) based on sparse prior for solving the orthogonal time frequency space (OTFS) channel estimation problem. Specifically, we formulate the problem as a denoising task and subsequently develop a residual learning-based denoiser to adeptly learn the residual noise. To harness the sparsity of the channel in the delay-Doppler (DD) domain, we insert proximal mapping as a new layer into the deep network, which directly and explicitly produces well-regularized outputs. In particular, the layer is implemented by a trainable soft shrinkage function with a threshold vector, where the thresholds can be adapted by a dedicated sub-network. Moreover, we derive a mathematical expression for the proposed network and conduct a thorough analysis exploiting Bayesian philosophy, which provides valuable insights into the interpretability of neural networks. Finally, simulation results demonstrate the superiority of the proposed method for sparse channel recovery in terms of both estimation performance and computational complexity.

其他

1.School of Electrical and Data Engineering, University of Technology Sydney, Sydney, Australia
2.Department of Computer Science and Information Technology, La Trobe University, Melbourne, Victoria, Australia
3.School of System Design and Intelligent Manufacturing and the Shenzhen Key Laboratory of Robotics and Computer Vision, Southern University of Science and Technology, Shenzhen, China
4.School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia

Xiaoqi Zhang,Chang Liu,Weijie Yuan,et al. Sparse Prior-Guided Deep Learning for OTFS Channel Estimation[J]. IEEE Transactions on Vehicular Technology,2024,PP(99).

Xiaoqi Zhang,Chang Liu,Weijie Yuan,J. Andrew Zhang,&Derrick Wing Kwan Ng.(2024).Sparse Prior-Guided Deep Learning for OTFS Channel Estimation.IEEE Transactions on Vehicular Technology,PP(99).

Xiaoqi Zhang,et al."Sparse Prior-Guided Deep Learning for OTFS Channel Estimation".IEEE Transactions on Vehicular Technology PP.99(2024).