| 摘要 |
<p>A radio receiver for operation in a radio system in which a plurality of radio channels are transmitted at frequencies spaced apart by a predetermined channel spacing, the receiver comprising an antenna for receiving a radio frequency signal, a demodulator for demodulating a signal derived from the radio frequency signal to form a demodulated signal and a filter for filtering the demodulated signal, the filter having a peak response in the region of the reception frequency and having nulls in its response in the region of frequencies spaced apart from the reception frequency by the channel spacing.</p> |
