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Method and apparatus for performing calculations for forward (alpha) and reverse (beta) metrics in a map decoder
Method and apparatus for performing calculations for forward (alpha) and reverse (beta) metrics in a map decoder
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机译:用于在地图解码器中执行正向(alpha)和反向(beta)度量的计算的方法和装置
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摘要
Method and apparatus for performing calculations for forward (alpha) and reverse (beta) metrics in a map decoder. The method includes using a min star (min*) operation to receive the metrics and a priori values as well as forming min star structures from individual min star operations. Two separate outputs from the min star operation may be maintained separately throughout all calculations and combined only when a final value is required. In addition input to the min star operators that are available prior to a particular decoder iteration may be combined separately to allow an increase in speed within decoding iterations. The same principals apply to the more popular max star operation.
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