| 摘要 |
A receiving arrangement for a radio signal includes a step-down mixer with a downstream signal processing chain and demodulator. An RSSI signal is obtained between the step-down mixer and the demodulator, for example in a limiter. The RSSI signal is high-pass filtered and supplied to a comparator in the form of a mean value thereof. The identification unit can detect as a function of the RSSI signal level whether no useful signal at all, an amplitude-modulated signal or a frequency-modulated signal is present. The demodulator is accordingly driven by a control unit. In accordance with the arrangement of the present invention it is possible, in a particularly simple and precise manner, to identify and correspondingly set a demodulator as a function of whether an amplitude-modulated or frequency-modulated signal is received.
|
