A 20-W Chireix Outphasing Transmitter for WCDMA Base Stations

A Chireix outphasing transmitter for Band I wideband code-division multiple-access base stations was implemented using a nonisolating power combiner and two high-efficiency saturated class-B power amplifiers for 20-W single-carrier power levels. Novel adaptive background calibration algorithms were...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2007-12, Vol.55 (12), p.2709-2718
Main Authors: Huttunen, A., Kaunisto, R.
Format: Article
Language:English
Subjects:
Adaptive algorithms
Algorithms
Amplifiers
Applied sciences
Base stations
Broadband amplifiers
Calibration
Channels
Chireix outphasing
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Equipments and installations
Exact sciences and technology
High power amplifiers
linear amplification with nonlinear components (LINC)
linear transmitters
Microwaves
Mobile radiocommunication systems
Multiaccess communication
Power combiners
Power measurement
Predistortion
Radiocommunications
RF power amplifiers (PAs)
Stations
Telecommunications
Telecommunications and information theory
Testing
Transmitters
Transmitters. Receivers
Wideband
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Description
Summary:A Chireix outphasing transmitter for Band I wideband code-division multiple-access base stations was implemented using a nonisolating power combiner and two high-efficiency saturated class-B power amplifiers for 20-W single-carrier power levels. Novel adaptive background calibration algorithms were developed and demonstrated for the mismatch calibration and phase predistortion of the two transmitter chains. The complete demonstrator was able to achieve an average efficiency of 30% for a 3GPP TestModel64 signal, measured at a channel output power of 20 W and an adjacent channel power ratio of -45 dB.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2007.907140