| 摘要 |
The invention relates to a method for determining the sampling instant of a clock signal (t<SUB>i</SUB>) for a circuit for determining symbols (Se) from a digitized signal (sd, S) which is coupled to at least one quadrature signal pair of a modulation method (QAM), wherein the digitized signal is converted to polar signal coordinates (R, alpha) with a radial component (R). In order to implement an optimization of the sampling instant independently of the frequency or phase offset of the carrier control on which the symbols depend, it is proposed that the rate-of-occurrence distribution of the signals over the radii, which are assigned to the modulation method within the complex plane, be considered at different sampling phases (phi<SUB>i</SUB>, phi<SUB>i2</SUB>) as the quality value (G, G*), and that the better quality value be selected from among the multiple rate-of-occurrence determinations. The variation of the sampling phase assigned to this value is subsequently employed to correct the sampling clock signal (t<SUB>i</SUB>).
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