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A SURVEY OF TECHNIQUES
LINEAR MODULATION SYSTEMS
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amplitude modulation angle modulated signal angle modulation approximation assumed audio average power band band-limited bandwidth baseband baseband signal binary digits carrier channel capacity circuit code word coefficients components correlation function defined demodulation detector input distributed encoder entropy envelope detector equal Equation equiprobable error probability finite Fourier transform frequency modulation gaussian noise given by Eq Hilbert transform impulse information signal information theory instantaneous frequency instants integral interval joint probabilities levels linear modulation low-frequency low-pass filter matched filter maximum mean square value modulated wave modulation systems multiplex narrowband nonlinear obtained optimum orthogonal orthonormal output signal-to-noise ratio peak phase phasor power spectral density probability density quantization quasi-static random process random variable received signal represented result sample function sampled signal sequence shown in Fig sideband signal power signal-to-noise ratio sinusoidal spectrum SSB Signal stationary statistical symbols tion transmission transmitted vector voltage waveform zero