222879 ⎘
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes; Decoding methods or techniques, not specific to the particular type of coding provided for in groups - ; Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors soft-output Viterbi algorithm based decoding, i.e. Viterbi decoding with weighted decisions soft-output Viterbi decoding according to Battail and Hagenauer in which the soft-output is determined using path metric differences along the maximum-likelihood path, i.e. "SOVA" decoding two-step SOVA decoding, i.e. the soft-output is determined by a second traceback operation after the determination of the hard decision like in the Berrou decoder
Soft output Viterbi algorithm method and decoder
#2Path comparison unit for determining paths in a trellis that compete with a survivor path
#3Path metric difference computation unit for computing path differences through a multiple-step trellis
#4Reliability unit for determining a reliability value for at least one bit decision
#5Methods and apparatus for processing a received signal using a multiple-step trellis and selection signals for multiple trellis paths
#6Reliability metric generation for trellis-based detection and/or decoding
#7Second stage SOVA detector
#8Method and apparatus for-soft-output viterbi detection using a multiple-step trellis
#9Data detection and decoding system and method
#10Parallel backtracking in Viterbi decoder