Radio signal programme information transmission system e.g. for car

摘要

The transmission system provides digital data corresp. to an alternative frequency or programme information code, identifying the other frequencies providing the same radio programme. This information is obtained by short-term switching of the receiver to each alternative frequency with evaluation of the reception quality to allow switching from the tuned frequency when an improved signal is obtained. Pref. the reception quality is evaluated using the signal distortion on its own or in addition to the reception field intensity, with the bit error rate of the radio data signal used as the criteria for the signal distortion.