| 摘要 |
A method and apparatus for recovering the timing frequency in a modulated data signal receiver containing a timing frequency generator, by demodulating a received signal with the aid of carriers which are shifted by 90 DEG in phase relative to one another to form two demodulation products, forming the sum of the squares of the two demodulation products, and determining changes in the value of that sum with respect to time to provide characteristic values which determine the adjustment criterion for the timing frequency generator.
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