Principles of Communication Systems

amplifier amplitude amplitude-modulated antenna assume average bandlimited bandpass bandwidth baseband filter baseband signal Calculate carrier frequency circuit code word communication system constant crosstalk decoder demodulator discriminator discussion distortion encoded erfc FM signal frequency deviation frequency modulation frequency range gaussian given in Eq Hence impulse increases input signal instantaneous integral log2 low-pass filter m²(t matched filter modulating signal multiplexing multiplier noise power normalized power operation output signal output SNR phase phasor plot power spectral density preemphasis Prob probability density probability of error quantization levels random variable RC circuit resistor result sampled signal shown in Fig sideband signal m(t signal power signal-to-noise ratio sinusoidal spectral components spectrum spike Suppose synchronous theorem threshold time-division multiplexed transfer function transmission transmitted two-port voltage waveform zero