| 摘要 |
Systems and techniques to interpret signals on a noisy channel. A described system includes a filter, buffer, detector, controller, and averager. The buffer can store a group of signals, including a filtered digital signal and previous signal(s). The controller can determine whether first discrete values are adequately indicated and initiate a retry mode when the first discrete values are not adequately indicated. The averager can produce a new signal, in the retry mode, based on an average of at least a portion of the group of signals. The detector can interpret the new signal as second discrete values. The controller can determine whether the second discrete values are adequately indicated based on a measurement of differences between hard decisions indicated by the new signal and hard decisions indicated by the filtered digital signal. The controller can selectively exclude a signal of the group of signals from the average.
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