Signal evaluation apparatus and signal evaluation method

Details Signal evaluation apparatus and signal evaluation method Signal evaluation apparatus and signal evaluation method

2006-07-18

2006-07-18

Lamarre, Guy (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S795000, C375S341000, C375S262000

Reexamination Certificate

active

07080313

ABSTRACT:
There is provided a signal evaluation apparatus and signal evaluation method capable of consistently measuring an accurate bit error rate regardless of the distribution profile of the difference of likelihoods (difference metrics) of data sequences. In the signal evaluation apparatus for decoding data sequences by means of maximum likelihood decoding, at least one pair of paths between which a distance has a minimum value are selected by a path selector circuit10.With regard to the paths selected by the path selector circuit10,a difference metric obtained by a difference metric calculator circuit9is statistically processed by a μ- and σ-calculator circuit13to calculate a bit error rate. Then, the bit error rate is corrected by correction means (11, 12, 14) on the basis of the number of measurement samples of the paths selected by the path selector circuit10and the number of all samples.

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