초록 ▼

A method and apparatus are provided for identifying errors in a detected sequence of values generates the detected sequence of values from channel samples using a detector designed for a channel with a first channel response characteristic. The detected sequence of values is filtered using a filter

A method and apparatus are provided for identifying errors in a detected sequence of values generates the detected sequence of values from channel samples using a detector designed for a channel with a first channel response characteristic. The detected sequence of values is filtered using a filter that emulates a second channel response characteristic to produce a sequence of simulated second channel samples. The channel samples provided to the detector are also provided to a second filter which emulates a response characteristic equal to the second channel response characteristic divided by the first channel response characteristic. This produces a sequence of actual second channel samples. A sequence of difference values is then generated by subtracting each of the simulated second channel samples from a corresponding actual second channel sample. Using the sequence of difference values, at least one error is identified in the detected sequence of values.

대표청구항 ▼

1. A method for identifying errors in a detected sequence of values that are determined from first channel samples obtained at an output of a signal transmission channel equalized to a first channel response characteristic, the method comprising steps of:(a) generating the detected sequence of value

1. A method for identifying errors in a detected sequence of values that are determined from first channel samples obtained at an output of a signal transmission channel equalized to a first channel response characteristic, the method comprising steps of:(a) generating the detected sequence of values from the first channel samples using a detector designed for a channel with a first channel response characteristic; (b) filtering the detected sequence of values using a filter capable of emulating a second channel response characteristic to produce a sequence of simulated second channel samples; (c) filtering the first channel samples using a filter capable of emulating a response characteristic that is equal to the second channel response characteristic divided by the first channel response characteristic, the filtering producing a sequence of actual second channel samples; (d) generating a sequence of difference values, each difference value based on the difference between a corresponding simulated second channel sample and a corresponding actual second channel sample; and (e) identifying at least one error in the detected sequence of values based on the sequence of difference values.