Estimation and direct equalization of doubly selective channels
EURASIP Journal on Applied Signal Processing
Efficient bidirectional DFE for doubly selective wireless channels
EURASIP Journal on Applied Signal Processing
A subspace method for the blind identification of multiple time-varying FIR channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Estimation of basis frequencies for time-varying SIMO channels: a second-order method
IEEE Transactions on Signal Processing
Adaptive blind equalization of time-varying SIMO systems driven by QPSK inputs
Digital Signal Processing
| Hi-index | 35.69 |
In this paper, we study the blind equalization problem of time-varying (TV) systems where the channel variations are too rapid to be tracked with conventional adaptive equalizers. We show that using a finite Fourier basis expansion, a TV antenna array system can be cast into a time-invariant multi-input, multi-output (MIMO) framework. The multiple inputs are related through the bases, thereby allowing blind equalization to be accomplished without the use of higher order statistics. Two deterministic blind equalization approaches are presented: one determines the channels first and then the equalizers, whereas the other estimates the equalizers directly. Related issues such as order determination are addressed briefly. The proposed algorithms are illustrated using simulations