Method and apparatus for reducing the computational complexity and relaxing the critical path of reduced state sequence estimationRSSE techniques

摘要

The reduced state sequence for a given number of states, reducing the critical path problem estimation (RSSE) of technology A method of reducing the complexity and apparatus is disclosed. The signal energy of a pulse through a minimum-phase channel is concentrated in the initial taps. Communication channel is represented using a discrete time model, the channel impulse response {f _k } ^L _{k = 0} memory length represented by ( has a L), f _{a k} is a coefficient of the channel tap k. Taps one through U are even they initial taps, and taps U + 1 through L is even they tail taps, where U is a predetermined number. Tab of the lower tail of the lower complexity algorithm, are removed, for example, using information passed to remove the tail tap decision-feedback equalizer is treated with (DFE) technique. Thereafter, only the initial taps are processed by the upper reduced state sequence estimation (RSSE) technique. DFE technique initially removes the intersymbol interference associated with the tail taps, and since RSSE technique (or M- algorithm (MA)) is applied only to the more important tail taps. Is processed in the feedback equalizer (DFE) - taps one through U are processed using the RSSE technique and taps U + 1 through L are the decision of the lower complexity. Decision for processing sub-tab of the tail-feedback equalizer (DFE) technique, such as passed forward / tail processing circuit, and the receiver including a circuit for processing the initial taps RSSE is disclosed