A general procedure for learning mixtures of independent component analyzers
Pattern Recognition
Non-redundant precoding and PAPR reduction in MIMO OFDM systems with ICA based blind equalization
IEEE Transactions on Wireless Communications
Fast converging semi-blind space-time equalisation for dispersive QAM MIMO systems
IEEE Transactions on Wireless Communications
Semi-blind gradient-Newton CMA and SDD algorithm for MIMO space-time equalisation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Semi-blind adaptive beamforming for high-throughput quadrature amplitude modulation systems
International Journal of Automation and Computing
| Hi-index | 35.68 |
In this paper, we concentrate on the direct semi-blind spatial equalizer design for MIMO systems with Rayleigh fading channels. Our aim is to develop an algorithm which can outperform the classical training-based method with the same training information used and avoid the problems of low convergence speed and local minima due to pure blind methods. A general semi-blind cost function is first constructed which incorporates both the training information from the known data and some kind of higher order statistics (HOS) from the unknown sequence. Then, based on the developed cost function, we propose two semi-blind iterative and adaptive algorithms to find the desired spatial equalizer. To further improve the performance and convergence speed of the proposed adaptive method, we propose a technique to find the optimal choice of step size. Simulation results demonstrate the performance of the proposed algorithms and comparable schemes.