## Communication systems: an introduction to signals and noise in electrical communication |

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### Contents

Introduction | 1 |

Signals and Spectra | 15 |

Signals and Linear Networks | 67 |

Copyright | |

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### Common terms and phrases

amplifier analog analysis approximately average power band bandlimited bandwidth baseband binary carrier frequency channel chap circuit communication systems constant demodulator density function detection deviation discrete distortion duration electrical electron entropy envelope detector 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 multiplexing noise power nonlinear output signal phase shift phasor postdetection power spectrum predetection pulse modulation 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