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Cancellation of interference distortions caused by intermodulation between FM signals on adjacent channels
Cancellation of interference distortions caused by intermodulation between FM signals on adjacent channels
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机译:消除由相邻频道上的FM信号之间的互调引起的干扰失真
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摘要
A crosstalk cancellation circuit includes a pair of input terminals to which interference affected FM signals are applied and a pair of output terminals from which distortionless demodulated signals are delivered. For each transmission channel an envelope detector is provided which is connected to the input terminal to detect the envelope of the FM signal. A closed-loop feedback circuits are cross-coupled across the output terminals to process the signals thereat with the detected envelopes to derive an offset signal for each channel, which is combined with a frequency-demodulated signal of the FM signal of each channel.
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