Triple-Structured Sparsity-Based Channel Feedback for RIS-Assisted MU-MIMO System.
Xu ShiJintao WangJian SongPublished in: IEEE Commun. Lett. (2022)
Keyphrases
- structured sparsity
- fading channels
- mimo systems
- group sparsity
- wireless channels
- statistical learning
- channel state information
- multiple input multiple output
- ofdm system
- compressive sensing
- group lasso
- learning problems
- sparsity inducing
- convex optimization problems
- regularization methods
- multipath
- variable selection
- learning tasks
- convex optimization
- optimization problems