Communication Systems&“Alice Adams has an inimitable &‘voice&’&–quick, deft, brilliantly evocative and specific. There is always something special about a story of hers, like a watercolor perfectly executed.&” --Joyce Carol Oates Award-winning writer Alice Adams, whose major themes were the varied lives of contemporary women and the hidden workings of human relationships is equally treasured for her short stories and her novels. The stories collected here represent the full range of her career, which included 25 appearances inThe New Yorker, 6 O.Henry First Prizes out of a total of 23 appearances, as well as inclusion in numerousBest American Short Storiesanthologies. In story after story insight joins with grace to show us the truth about the lives of people around us. Included: &“Verlie I Say Unto You,&” &“Beautiful Girl,&” &“The Swastika on the Door,&” &“Greyhound People,&” &“The Girl Across the Room,&” Truth or Consequences,&” &“Separate Planes,&” &“Your Doctor Loves You,&” &“Old Love Affairs,&” &“Earthquake Damage,&” and 43 other classic stories. |
Contents
Random Signals and Noise | 134 |
Amplitude Modulation Systems | 242 |
Angle Modulation Systems | 316 |
Copyright | |
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amplitude modulation amplitude spectrum applied approximation assume autocorrelation function band band-pass filter baseband baseband signal m(t binary carrier frequency carrier wave carrier-to-noise ratio channel complex envelope Consider correlation corresponding defined delta function demodulator denote Determine distortion DSBSC wave duration envelope detector equal equivalent evaluate Example Figure filter output FM wave frequency f frequency modulation g₁(t H₁ Hilbert transform illustrated in Fig in-phase input signal integral interval linear low-pass filter matched filter message signal modulation systems noise power obtained oscillator output signal-to-noise ratio phase phase-locked loop probability density function Problem product modulator Px(x quadrature components quantizing random process X(t random variable receiver output rectangular pulse result Rx(t sample function sequence shown in Fig shown plotted side-frequencies signal g(t signal-to-noise ratio sinusoidal modulating sinusoidal wave spectral density SSB wave symbol transfer function transmission bandwidth transmitted voltage wave s(t white Gaussian noise zero