Equalisation with adaptive time lag
journal contributionposted on 30.06.2017, 15:50 by Yu GongYu Gong, Colin F. Cowan
In an adaptive equaliser, the time lag is an important parameter that significantly influences the performance. Only with the optimum time lag that corresponds to the best minimum-mean-square-error (MMSE) performance, can there be best use of the available resources. Many designs, however, choose the time lag either based on preassumption of the channel or simply based on average experience. The relation between the MMSE performance and the time lag is investigated using a new interpretation of the MMSE equaliser, and then a novel adaptive time lag algorithm is proposed based on gradient search. The proposed algorithm can converge to the optimum time lag in the mean and is verified by the numerical simulations provided.
This research was sponsored by the UK Engineering and Physical Sciences Research Council under grant GR/S00217/01.
- Mechanical, Electrical and Manufacturing Engineering