Some results for the fast MMSE-SIC detection in spatially multiplexed MIMO systems
IEEE Transactions on Wireless Communications
A new THP precoding scheme with effective channel optimization
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Robust precoding with Bayesian error modeling for limited feedback MU-MISO systems
IEEE Transactions on Signal Processing
Performance optimization of Tomlinson-Harashima precoder with tilted constellation
IEEE Communications Letters
Hybrid Supervised-Unsupervised Channel Estimation Scheme with Dynamic Transmission of Pilots
Neural Processing Letters
IEEE Transactions on Communications
Robust Non-linear Precoder for Multiuser MISO Systems Based on Delay and Channel Quantization
Wireless Personal Communications: An International Journal
The Effect of Decision Delay in MMSE-THP Systems
Wireless Personal Communications: An International Journal
| Hi-index | 35.69 |
We study computationally efficient spatial multiplexing transmission techniques aiming at high spectral efficiency. Two nonlinear transmission schemes based on the minimum mean-squared error criterion are considered in this paper: a detection scheme also known as V-BLAST and a precoding scheme called Tomlinson-Harashima precoding. The nonlinear techniques are known to be more powerful than simple linear filters, however, a large complexity overhead results. Initial proposals for the nonlinear schemes require the complexity proportional to N4 if the number of data streams is denoted by N. We propose to apply Cholesky factorization with symmetric permutation for finding a very simple and efficient algorithm that reduces the complexity by a factor of N. We conclude that the large performance advantage of the nonlinear detection and precoding schemes against their simple linear alternatives can be obtained without complexity overhead