Equalisation of time variant multipath channels using amplitude banded techniques

For the purpose of equalisation of rapidly time variant multipath channels, the RLS algorithm might provide better performance than the LMS algorithm. However, the RLS algorithm requires complicated operation to adapt the equaliser coefficients. In this paper, we derive a novel adaptive algorithm, amplitude banded LMS (ABLMS), and develop it as the adaptation procedure for a linear transversal equaliser (LTE) and a decision feedback equaliser (DFE). Computer simulations demonstrate that with small increase of computational complexity, the ABLMS equalisers provide a significant improvement related to the conventional LMS DFE as well as LMS LTE