Decoding method for convolutionally coded signal
First Claim
1. A decoding method for a convolutionally coded signal of a communication system pre-storing recursion state metrics for decoding sub-trellises resulting in accelerating iteration loop convergence and reducing bit error rates, the convolutionally coded signal comprising a trellis with steps, the decoding method comprising:
- determining a plurality of first sub-trellises from the trellis, and determining a corresponding step for each of the first sub-trellises, each corresponding step represented by a corresponding dividing line in the trellis, each dividing line distinct from the boundaries of all the first sub-trellises;
decoding the first sub-trellises to generate a plurality of state metrics;
storing a first record containing the plurality of state metrics generated prior to and subsequent to the corresponding steps;
determining a plurality of second sub-trellises from the trellis, the boundaries of each of the second sub-trellises being distinct and non-aligned with the boundaries of each of the first sub-trellises; and
decoding the second sub-trellises by utilizing the first record as an initial condition of the second sub-trellises.
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Abstract
A decoding method for a convolutionally coded signal is provided. The convolutionally coded signal includes a trellis. The decoding method includes determining a plurality of first sub-trellises from the trellis, decoding the first sub-trellises, determining a plurality of second sub-trellises from the trellis, boundaries of the second sub-trellises being different from boundaries of the first sub-trellises, and decoding the second sub-trellises.
34 Citations
18 Claims
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1. A decoding method for a convolutionally coded signal of a communication system pre-storing recursion state metrics for decoding sub-trellises resulting in accelerating iteration loop convergence and reducing bit error rates, the convolutionally coded signal comprising a trellis with steps, the decoding method comprising:
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determining a plurality of first sub-trellises from the trellis, and determining a corresponding step for each of the first sub-trellises, each corresponding step represented by a corresponding dividing line in the trellis, each dividing line distinct from the boundaries of all the first sub-trellises; decoding the first sub-trellises to generate a plurality of state metrics; storing a first record containing the plurality of state metrics generated prior to and subsequent to the corresponding steps; determining a plurality of second sub-trellises from the trellis, the boundaries of each of the second sub-trellises being distinct and non-aligned with the boundaries of each of the first sub-trellises; and decoding the second sub-trellises by utilizing the first record as an initial condition of the second sub-trellises. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A decoding method for a convolutionally coded signal of a communication system pre-storing recursion state metrics for decoding sub-trellises resulting in accelerating iteration loop convergence and reducing bit error rates, the convolutionally coded signal comprising a trellis, the decoding method comprising:
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determining a plurality of first sub-trellises from the trellis, wherein the first sub-trellises forms the trellis, the boundaries of all the first sub-trellises defined by a dividing line in the trellis corresponding to a given step; decoding the first sub-trellises; determining a plurality of second sub-trellises from the trellis, wherein the second sub-trellises forms the trellis, and boundaries of the second sub-trellises are non-aligned, distinct, and different from the boundaries of the first sub-trellises; and decoding the second sub-trellises. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification