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OFDM Wireless LANs: A Theoretical and Practical Guide
book

OFDM Wireless LANs: A Theoretical and Practical Guide

by John Terry, Juha Heiskala
December 2001
Intermediate to advanced content levelIntermediate to advanced
336 pages
8h 42m
English
Sams
Content preview from OFDM Wireless LANs: A Theoretical and Practical Guide

Phase Noise

Most of the discussions in this chapter have been presented with the baseband representation. Yet, to transmit information across a wireless channel, it is necessary to modulate the baseband information onto a RF carrier. Thus, an oscillator is required to generate the RF carrier. Like all real devices, the oscillator is a source of noise in the system. This section is dedicated to the development of this noise, and its effect on a OFDM system. To develop the noise associated with oscillators, a model is needed. D. P. Newkirk and U. L. Rohde [22] model an oscillator as a feedback system, which is comprised of a phase modulator cascaded with an amplifier and resonator as shown in Figure 5.28. The transfer characteristics of the phase ...

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Publisher Resources

ISBN: 0672321572Purchase book