We know the Fourier coefficients a„, b, of some signal which is being transmitted. The transmitter modifies the signal in two ways: first, by doubling the amplitude of the signal; second, by delaying...

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Extracted text: We know the Fourier coefficients a„, b, of some signal which is being transmitted. The transmitter modifies the signal in two ways: first, by doubling the amplitude of the signal; second, by delaying the signal by a quarter-period. How are the Fourier coefficients affected by these transformations?