New percentage linearization measures of the degree of linearization of HPA nonlinearity

A percentage linearization (PL) and a percentage linearization area (PLA) are defined and proposed as two new measures of the degree of AM-to-AM linearization, achieved by a linearization scheme, of the saturating region of nonlinear high power amplifiers (HPAs). The measures are based on defining a...

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Bibliographic Details
Published in:IEEE communications letters 2004-04, Vol.8 (4), p.214-216
Main Authors: O'Droma, M., Mgebrishvili, N., Goacher, A.
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Area measurement
Circuit properties
Electric, optical and optoelectronic circuits
Electron mobility
Electronic circuits
Electronics
Exact sciences and technology
HEMTs
High power amplifiers
MODFETs
PHEMTs
Power measurement
Programmable logic arrays
Solid state circuits
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Testing
Transmission and modulation (techniques and equipments)
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Summary:A percentage linearization (PL) and a percentage linearization area (PLA) are defined and proposed as two new measures of the degree of AM-to-AM linearization, achieved by a linearization scheme, of the saturating region of nonlinear high power amplifiers (HPAs). The measures are based on defining a HPA saturation power point which is very close to the asymptotic output saturation power (AOSP) line. Here the point where the first derivative of the AM-to-AM dB power characteristic drops to 0.1 is so defined. Employing the passage through a typical pseudomorphic high electron mobility transistor solid-state power amplifier (PHEMT SSPA) of an UWC-136 8-PSK signal, as a test signal, an introductory insight into the usefulness of these linearization measures is presented.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2004.823368