| 摘要 |
<p>Receivers including a multipath transmission detector 8 for detecting multipath distortion in angle-modulated input signals originating from inter alia first antenna 7-1, are often erroneously triggered, more specifically in the case of weak signal, which in diversity systems having a plurality of antennas results in unnecessary switching action. By providing the receiver 1 with a frequency window circuit 12 which inhibits the detection of multipath distortion as long as the instantaneous frequency of the input signal is located outside the frequency window, erroneously recognizing distortion as multipath distorion due to a limited bandwidth of the receiver 1 is reduced. The frequency window circuit 12 can, for example, be in the form of a bandpass filter or a level detector 14 connected to the demodulator 6. </p> |
