Doherty Feed-Forward Amplifier Performance Using a Novel Crest Factor Reduction Technique

This letter describes a novel iterative crest factor reduction (CFR) technique applied to a Doherty feedforward linear power amplifier (DFFLPA). This novel CFR technique is based on repeated peak cancellations and uses a scaling factor to reduce complexity. According to our results, only three itera...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 17; no. 1; pp. 82 - 84
Main Authors Wan-Jong Kim, Kyoung-Joon Cho, Stapleton, S.P., Jong-Heon Kim
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.01.2007
Institute of Electrical and Electronics Engineers
Subjects
Algorithms
Amplifiers
Applied sciences
Broadband amplifiers
Cancellation
Carriers
Circuit properties
Doherty power amplifier (DPA)
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
error vector magnitude (EVM)
Exact sciences and technology
feed-forward linear power amplifier (FFLPA)
Feedforward
Feedforward systems
finite impulse response (FIR) filter
Finite impulse response filter
Frequency filters
Linearity
Low pass filters
Microwaves
Multiaccess communication
OFDM
Peak to average power ratio
peak-to-average power ratio (PAPR)
Power amplifiers
Radio frequency
Reduction
Scaling factors
Performance evaluation
Doherty power amplifier (DPA)
Wireless telecommunication
Linear amplification
Peak to average power ratio
Wide band transmission
Iterative method
finite impulse response (FIR) filter
Algorithm
error vector magnitude (EVM)
Digital filter
Code division multiple access
Finite impulse response filter
peak-to-average power ratio (PAPR)
Power amplifier
Feedforward
feed-forward linear power amplifier (FFLPA)
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Summary:This letter describes a novel iterative crest factor reduction (CFR) technique applied to a Doherty feedforward linear power amplifier (DFFLPA). This novel CFR technique is based on repeated peak cancellations and uses a scaling factor to reduce complexity. According to our results, only three iterations result in over 4-dB reduction for a two carrier WCDMA signal. Experimental results demonstrate that the proposed algorithm was able to enhance the DFFLPA system efficiency from 11.5% to 18.3%
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2006.887287