Communication Systems |
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Page 61
... impulse response , which is defined as the response of the system ( with zero initial conditions ) to a unit impulse or delta function d ( t ) applied to the input of the system . If the system is time - invariant , then the shape of ...
... impulse response , which is defined as the response of the system ( with zero initial conditions ) to a unit impulse or delta function d ( t ) applied to the input of the system . If the system is time - invariant , then the shape of ...
Page 62
... response of the system to a unit impulse or delta function d ( t ) , occurring at t = 0 , is h ( t ) . It follows , therefore , that the response of the system to a delta function , weighted by the factor x ( t ) At and occurring at t ...
... response of the system to a unit impulse or delta function d ( t ) , occurring at t = 0 , is h ( t ) . It follows , therefore , that the response of the system to a delta function , weighted by the factor x ( t ) At and occurring at t ...
Page 85
... impulse response h ( t ) and transfer function H ( f ) . We assume that the frequency response of the system is limited to frequencies within + B of the carrier frequency f . The system bandwidth 2B is usually narrower than or equal to ...
... impulse response h ( t ) and transfer function H ( f ) . We assume that the frequency response of the system is limited to frequencies within + B of the carrier frequency f . The system bandwidth 2B is usually narrower than or equal to ...
Contents
Representation of Signals and Systems | 12 |
Amplitude Modulation | 114 |
Noise in CW Modulation | 316 |
Copyright | |
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assume autocorrelation function average power average probability band-pass filter band-pass signal bandwidth baseband baseband signal binary PSK binary sequence binary wave carrier frequency carrier wave carrier-to-noise ratio channel coherent complex envelope Consider correlation corresponding defined delta function demodulator denote DSBSC wave duration envelope detector equal Figure filter output FM wave frequency f frequency modulation Hilbert transform impulse response input signal integral interval linear low-pass filter message points message signal modulating wave multiplexing noise power obtained oscillator output signal-to-noise ratio PCM system phase phase-locked loop power spectral density probability density function probability of error Problem produced Product modulator pulse QPSK quadrature components quantizing random process X(t random variable received signal receiver output result Rx(t sample function shown in Fig side-frequencies signal g(t signal-to-noise ratio spectral density No/2 spectrum SSB wave transfer function transmission bandwidth variance vector wave s(t waveform zero mean