| 摘要 |
A fast adjustment of sampling clock phase may be accomplished by calculating the values of the pre-oscillations and post-oscillations that would have been present at each sampling instant to form a correction value so that they may then be subtracted from the measured sample value and only the influence of the distorted unique word remains. Usable control information for readjusting the phase of the sampling clock may thus be derived after only one frame synchronization word has been detected. In a preferred embodiment, the required pre-oscillation and post-oscillation values are derived from the regenerated character data; rather than correcting the sample values themselves, correction values are derived which are used to correct quantities derived from the sample values. The transmission coefficients of the transmission path used to derive the required pre-oscillation and post-oscillation values from the regenerated characters may be either established a priori or derived from the equalization coefficients of an otherwise conventional adaptive equalizer.
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