ENHANCED METHOD FOR ADAPTIVE EQUALIZATION TECHNIQUE IN MOBILE WIRELESS SYSTEMS

摘要

The present invention is, in one embodiment, a method for adaptively equalizing an output of a digital communication channel; including steps of: generating an initial channel estimation (20); determining an initial set of metric states of a trellis, based on known symbols of a received input signal (10) comprising a sequence of symbols; updating the set of metric states according to the initial channel estimation (20) and the received signal; updating a set of paths for the metric states using a delayed tentative decision of a symbol of the received signal, to determine a set of survivor paths (40); and updating the channel estimation (60), based on the updated metrics, delayed tentative decision, and the received signal. This process enables reliable demodulation performance under conditions of severe channel impairments.