| 摘要 |
A noise suppression apparatus for use in a receiver includes an input terminal adapted to receive an inbound signal. A channel splitter is coupled to the input terminal and configured to split the inbound signal into a substantially identical first signal and second signal. A first mixer coupled to the channel splitter and configured to receive the first signal, and a second mixer coupled to the channel splitter and configured to receive the second signal. A first local oscillator is coupled to the first mixer and configured to generate a first LO frequency signal, and a second local oscillator coupled to the second mixer and configured to generate a second LO frequency signal, where the first LO frequency signal and second LO frequency signal differ from one another. The first mixer is configured to mix the first signal with the first LO frequency signal to create a first mixed signal, and the second mixer is configured to mix the second signal with the second LO frequency signal to create a second mixed signal. A combiner is coupled to the first mixer and the second mixer and configured to combine the first mixed signal with the second mixed signal to create a noise suppressed output signal. Advantages of the invention include a high quality signal with an improved signal-to-noise ratio. |
