H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/00 (2006.01) H04L 25/03 (2006.01) H04L 27/01 (2006.01)
Patent
CA 2310178
A method and apparatus are disclosed for reducing the complexity of reduced state sequence estimation (RSSE) techniques for a given number of states while also reducing the critical path problem. The signal energy of a pulse that has gone through a minimum-phase channel is concentrated in the initial taps. A communications channel is represented using a discrete time model, where the channel impulse response has a memory length, L, denoted by {.function.'k}~=o, where .function.k is the coefficient for channel tap k. Taps one through U are referred to as the initial taps, and taps U+1 through L are referred to as the tail taps, where U is a prescribed number. The less significant tail taps are processed with a lower complexity cancellation algorithm, such as a decision-feedback equalizer (DFE) technique, that cancels the tail taps using tentative decisions. Thereafter, only the more significant initial taps are processed with a reduced state sequence estimation (RSSE) technique. The DFE technique initially removes the intersymbol interference associated with the tail taps, then the RSSE technique (or M- algorithm (MA)) is applied only to the more important tail taps. Taps one through U are processed using the RSSE technique and taps U+1 through L are processed with the lower complexity decision-feedback equalizer (DFE). A receiver is disclosed that includes a tentative decision/tail processing circuit, such as a decision- feedback equalizer (DFE) technique, for processing the less significant tail taps and an RSSE circuit for processing the initial taps.
Haratsch Erich Franz
Viswanathan Harish
Kirby Eades Gale Baker
Lucent Technologies Inc.
LandOfFree
Method and apparatus for reducing the computational... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing the computational..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing the computational... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1967343