Download e-book for iPad: Communication systems engineering by John G. Proakis

By John G. Proakis

ISBN-10: 0130617938

ISBN-13: 9780130617934

ISBN-10: 0130950076

ISBN-13: 9780130950079

New moment variation introduces the elemental rules underlying the research and layout of conversation structures. offers a pretty good creation to analog communications and a overview of significant mathematical starting place themes. earlier variation c1994. Softcover. overview Introducing innovations within the research and layout of analog and electronic communique structures, this article is meant basically to be used in a senior or first-year graduate introductory direction in communications. It assumes a powerful history in signs and linear structures concept and undemanding chance. The textual content offers a particular insurance of verbal exchange platforms issues, together with resource coding, channel coding, baseband and service modulation, channel distortion and equalization, synchronization, and spread-spectrum innovations. as a result of the expanding incidence of electronic verbal exchange applied sciences, it supplies major emphasis to electronic communique ideas and methods. even if the textual content is extra theoretical than applications-oriented, it comprises over one hundred eighty worked-out examples and over 480 difficulties (many with solutions) to assist the reader in utilizing the idea to real-world occasions. The authors provide additional awareness to the more difficult techniques, making this an incredible textual content for these new to the topic.

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This allows for the reconstruction filter to be realizable and easier to build. , W) - W = fs - 2W, is known as the guard band. Note that there exists a strong similarity between our development ofthe sampling theorem and our previous development of the Fourier transform for periodic signals (or (t - In this section, we examine time domain and frequency domain characteristics of a class of signals frequently encountered in communication system analysis. This class of signals is the class of bandpass or narrowband signals.

2)] that the bandwidth ofthe modulated signal is 2 W, twice the bandwidth of the message signal, and that there exists no impulse at the carrier frequency ±fc in the power-spectral density. Therefore, the modulated signal is suppressed carrier (SC).. 6) Note that met) is mUltiplied by cos(¢c - ¢). Thus, the desired signal is scaled in amplitude by a factor that depends on the phase difference between the phase ¢c of the carrier in the received signal and the phase ¢ of the locally generated sinusoid.

Show that the unit step signal U-l (t) (the unit step function) is a power-type signal and find its power content. K' 3. Show that the signal H(f) x(t) = t > 0 t:sO f 1. xU) = e- cos(f3t)U_l (t) a, f3 > 0 U_I (t) + x(nTs)p(t - nTs ) n=-oo I::'-oo A(t - 5. x(t) = If I < 7000 7000 < IfI < 10000 otherwise 00 L xp(t) = 2. x (t) = sinc(t) 3. xU) = 4. 36 Let the signal x(t) = Asinc(1000t) be sampled with a sampling frequency of 2000 samples per second. Determine the most general class of reconstruction filters for perfect reconstruction of this signal.

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Communication systems engineering by John G. Proakis

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