Method and apparatus for equalization of a non-linear transmission channel

摘要

The method involves receiving a pilot sequence of modulation symbols (110) corresponding to a path passing through all allowed branches of lattice. A corresponding observable is stored for each branch. A sequence of modulation symbols to be equalized is received, and a most likely sequence of modulation symbols is determined (130) corresponding to a lowest metric path in the lattice. A metric of a path is calculated as sum of metrics of the branches, and a branch metric (120) is calculated as a distance between the observable provided for the symbol and the stored observable. The modulation symbols are phase shift keying (PSK) symbols. An independent claim is also included for a receiver for receiving a signal transmitted by a transmitter on a transmission channel.