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Network Management, 2nd Edition
book

Network Management, 2nd Edition

by Mani Subramanian
February 2010
Beginner to intermediate content levelBeginner to intermediate
724 pages
23h 39m
English
Pearson Education India
Content preview from Network Management, 2nd Edition

D

Spread Spectrum Technology: OFDM

Orthogonal Frequency Division Multiplexing (OFDM) is a modulation scheme that comprises multicarrier, multisymbol, and multirate techniques using spread spectrum technology. It is converged technologies of spread spectrum, Fast Fourier Transform (FFT), and multiple input multiple output (MIMO) antennae.

Broadband services require transmission of modulation of broadband signal at a high digital data rate. Due to frequency selective fading, the digital pulses in the time domain are spread out, interfering with neighboring digits and thus causing inter-symbol interference (ISI). This is shown in Figure D.1.

The basic principle of operation of OFDM is to divide the broadband-modulated carrier into narrow-band ...

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Publisher Resources

ISBN: 9788131727591