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Power Amplifier Linearization in Wireless Communication Systems by Pooria Varahram (Paperback, 2011)

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About this product

Product Information

Power Amplifiers (PAs) are one of the key elements in communication systems and they are nonlinear in a certain operation region. The nonlinearity generates spectral regrowth, which leads to Adjacent Channel Interference (ACI) and violations of the out of band emission. To reduce the nonlinearity, the power amplifier can be backed off to operate within the linear portion of its operating curve. However, transmission formats such as Wideband Code Division Multiple Access (WCDMA) and Orthogonal Frequency Division Multiplexing (OFDM), have high Peak to Average Power Ratios (PAPR), it means the large fluctuations in their signal envelopes. This means that the power amplifier needs to be backed off far from its saturation point, which results in very low efficiencies, typically less than 10%, more than 90% of the dc power is lost and turns into heat. By increasing the number of the base stations and then the number of power amplifiers, improvement in efficiency of the power amplifier reduce the cost of the system. To enhance the power amplifier efficiency without compromising its linearity, power amplifier linearization is essential.

Product Identifiers

Publisher
Lap Lambert Academic Publishing
ISBN-13
9783845432823
eBay Product ID (ePID)
190616971

Product Key Features

Author
Pooria Varahram
Publication Name
Power Amplifier Linearization in Wireless Communication Systems
Format
Paperback
Language
English
Subject
Engineering & Technology
Publication Year
2011
Type
Textbook
Number of Pages
140 Pages

Dimensions

Item Height
229mm
Item Width
152mm
Item Weight
213g

Additional Product Features

Title_Author
Pooria Varahram
Country/Region of Manufacture
Germany

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