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Signals and Spectra
Signals and Linear Networks
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amplifier analog analysis approximately average power band bandlimited bandwidth baseband binary carrier frequency channel chap circuit communication systems constant deemphasis demodulator density function detection deviation discrete distortion duration electrical electron entropy envelope detector equal equivalent error probability example exponential modulation Fourier series Fourier transform frequency domain gaussian Hence ideal impulse response integration limit line spectrum linear modulation lowpass filter message band message digits modulating signal noise power nonlinear phase shift phasor postdetection power spectrum predetection pulse shape quantized random signals random variable receiver rectangular pulse resistor sample values shown in Fig signal power signal-to-noise ratio signaling speed sine sinusoidal spectra statistically independent symbols synchronous techniques temperature theorem theory threshold tion tone modulation transfer function transmission bandwidth two-port variations voltage waveform white noise xc(t zero