| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal evaluating device and a method in which accurate measurement is always made for a bit error rate regardless of the distribution shape of the likelihood differences (difference metrics) of a data group. SOLUTION: In the signal evaluating device in which a data group is decoded using a maximum likelihood decoding, a path in which distance between two paths becomes a minimum value is selected by a path selecting circuit 10. A difference metric obtained by a difference metric computing circuit 9 for the path selected by the circuit 10 is statistically processed by aμ,σcomputing circuit 13 in order to compute a bit error rate. Then, the bit error rate is corrected by correcting means (11, 12 and 13) based on the measurement sample number of the path selected by the circuit 10 and a total sample number. COPYRIGHT: (C)2003,JPO
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