| 摘要 |
A receiver is provided in which a composite signal is split into two paths. In the first path, a desired signal channel is suppressed by a notch filter. The remaining channels in the composite signal are inverted. In the second path, the signal is delayed to match the delay imposed by the first path. The signal from the first path is rec ombined with the second path, which reduces the signal level of the undesired channels t o the level of quantization noise. The desired signal can then be amplified using the full d ynamic range of the amplifier circuitry. If desired, more than one channel may be recei ved at a time. Further, if the two or more channels that are being received have differen t signal strengths, the digital filtering functions of the notch filter can be used to se lectively weight the signals to equalize their strengths. In addition, channels of different band widths can be received.
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