Titlebook: Introduction to Communication Science and Systems; John R. Pierce,Edward C. Posner Book 1980 Springer Science+Business Media New York 1980

使苦恼

John R. Pierce,Edward C. Posnerf war and anxious about the prospects of further conflict. Although fighting had been suspended and peace talks had begun, England was still technically at war with France. Its relationship with Philip II of Spain — the realm’s king-consort until Mary’s death and sovereign of a vast agglomeration of

漂亮

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John R. Pierce,Edward C. Posnerdie posttraumatische Gelenksteife; diese beinhaltet den Verlust eines Teils des natürlichen Bewegungsumfangs. In den meisten Fällen ist eine Bewegungsrichtung mehr betroffen, so daß man zur Unterscheidung von einer residualen Flexionskontraktur bzw. einer Extensionskontraktur sprechen kann. Auch Kom

innovation

John R. Pierce,Edward C. Posnerdie posttraumatische Gelenksteife; diese beinhaltet den Verlust eines Teils des natürlichen Bewegungsumfangs. In den meisten Fällen ist eine Bewegungsrichtung mehr betroffen, so daß man zur Unterscheidung von einer residualen Flexionskontraktur bzw. einer Extensionskontraktur sprechen kann. Auch Kom

FRONT

Sources of Noise,ansmitted power is picked up by the receiving antenna. The receiving antenna also picks up as . random electromagnetic radiation from any body that lies within its beamwidth, and some noise from interstellar space, which is filled with electromagnetic radiation. Thus the electromagnetic wave which t

flourish

Signals and Frequencies,complicated signals. Before we proceed to consider the transmission of such signals, we need to know a little about the representation of complicated waveforms, and even of two-dimensional patterns, by sums of sine waves. Why sines and cosines? Because these functions are the stable or bounded solut

防锈

Modulation and Noise,frequency carrier signal of constant amplitude. We have specified the noisiness of a receiver in terms of a noise temperature. We have discussed the noise performance of an ideal receiver which is, of course, better than that of any actual receiver. Given transmitter power, antenna sizes including a

影响带来

Isthmus

Pulse Shape, Filtering, and Arraying,igital transmission. We will find that variational techniques permit us to match pulses optimally to channel transfer functions. This is useful when we can do something about the pulses but cannot modify the channel, which may be provided by a common carrier. We shall also study optimal signal combi

导师

Random Processes and Gaussian Signals and Noise,nted with entire . These are random, but they are not described by a single distribution of values. We need a way of describing their randomness that will provide answers to communication questions that depend on the entire waveform. For example, we may wish to know the actual energy in a noise wave