Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2005-09-30
2011-10-04
Baderman, Scott (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
08032818
ABSTRACT:
Methods and apparatus are provided for storing survivor paths in a Viterbi detector. At least one register and at least one pointer are maintained for each state. Each register stores a bit sequence associated with a Viterbi state and each pointer points to one of the registers. A trellis transition type is determined, for example, based on a decision from an add/compare/select unit. One or more predefined rules based on a trellis structure and the trellis transition type are employed to exchange one or more of the pointers and to update one or more of the at least one registers. A survivor path memory is also disclosed for a Viterbi detector. The survivor path memory comprises a plurality of columns, each associated with a different time step, and an input processor. Each column comprises a latch for storing one bit of a bit sequence associated with a Viterbi state.
REFERENCES:
patent: 6601215 (2003-07-01), Thurnhofer
U.S. Appl. No. 11/241,759, filed Sep. 30, 2005, Graef.
U.S. Appl. No. 11/241,760, filed Sep. 30, 2005, Graef.
Agere Systems Inc.
Ahmed Enam
Baderman Scott
Ryan & Mason & Lewis, LLP
LandOfFree
Method and apparatus for storing survivor paths in a Viterbi... 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 storing survivor paths in a Viterbi..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for storing survivor paths in a Viterbi... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4295064