| 摘要 |
A receiver is arranged to receive at least two RF signals ( 51,52 ). A first RF signal of the at least two radio frequency signals (S] 5 S 2 ) is having a first center frequency, whilst a second signal of the at least two RF radio frequency signals (si,s 2 ) is having a second center frequency, the receiver comprises a frequency shifter ( 10,11 ) arranged to shift the first center frequency to the second center frequency and a combiner ( 12 ) arranged to combine the frequency shifted first RF signal <SUB>(S3) </SUB>with the second RF signal (si) so as to obtain a combined RF signal (s 4 ). The receiver further comprising a frequency down converter ( 15,16 ) arranged to frequency down convert the combined RF signal (s 4 ) to a combined lower frequency signal and a demodulator ( 19 ) arranged to demodulate the combined lower frequency signal.
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