Optimal Soft Detection for Tomlinson–Harashima Precoded Multiuser MIMO System
Abstract
We derive the exact a posteriori probability (APP) for optimal soft detection of channel-coded Tomlinson-Harashima precoding (THP), where Gaussian-distributed and integer interference are considered. With such optimal soft detection, an improvement of 2 dB over existing channel-coded THP with soft-demapping is achieved, and the scheme performs within 1.2 dB the interferencefree upper bound. Further, we apply our designed coded THP in downlink multi-user multiple-input multiple-output (MU-MIMO) to realize efficient successive pre-cancellation of interference, where considerable performance enhancement over linear precoding is demonstrated.
Fields of Study & Subjects
Advanced Wireless Communication Techniques
Advanced MIMO Systems Optimization
Wireless Communication Networks Research
Publication details
- Journal / source
- IEEE Transactions on Vehicular Technology
- Volume
- 75
- Issue
- 8
- Pages
- 18507–18512
- Publication date
- 6 March 2026
- Language
- EN