Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2011-08-23
2011-08-23
Alphonse, Fritz (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S795000, C714S758000
Reexamination Certificate
active
08006170
ABSTRACT:
A bit quality evaluator receives a sequence of bits. A quality measure is assigned to each bit within the sequence. The bit sequence and the quality measures are provided to a decoding device that performs soft decision convolutional decoding on the sequence of bits using the quality measure. An off-path detector detects an occurrence of a trellis decode path change during the convolutional decoding operation and identifies a first symbol proximate corresponding to the occurrence of the trellis decode path change. An erasure decision circuit identifies at least the first symbol for erasure. The output of the first decoder and the erasure decision circuit are received at a second decoder, which decoder decodes the output of the first decoder after erasing at least the first symbol. The erasure decision circuit may also identify additional symbols for erasure based on performance measures of the trellis decode path and the quality measure of the sequence of bits.
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Harwood Theodore L.
Maiuzzo Michael
Smith John P.
Warner Jesse David
Alphonse Fritz
Sentel Corporation
The Marbury Law Group PLLC
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