Communication Systems |
Contents
Representation of Signals and Systems | 10 |
Amplitude Modulation | 112 |
Noise in CW Modulation | 316 |
Copyright | |
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amplitude applied approximation assume autocorrelation function average band band-pass bandwidth baseband binary called carrier carrier frequency channel coherent communication compared complex condition Consider consists constant correlation corresponding decision defined delay demodulator denote described detector Determine device distortion duration effect energy envelope equal equivalent error Example express Figure filter FM wave follows Fourier transform frequency Gaussian given ideal illustrated independent input input signal integral interval limited linear loop low-pass filter mean message signal modulating wave narrow-band noise Note observation obtained operation original oscillator output pair periodic phase possible power spectral density probability Problem produced pulse quantizing random process random variable receiver referred relation represented respectively response result sample sequence Show shown in Fig sideband signal signal g(t signal-to-noise ratio sinusoidal spectrum symbol transmission transmitted vector zero