A Crest Factor Reduction Technique for LTE Signals with Target Relaxation in Power Amplifier Linearization

The signal conditioning treatment to achieve good relation of power with radio-frequency (RF) conversion in conventional transceiver systems require precise baseband models. A developed framework is built to provide a demonstration of the modeling figures of merit with orthogonal frequency division...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-02, Vol.22 (3), p.1176
Main Authors: Cárdenas-Valdez, José Ricardo, Galaviz-Aguilar, Jose Alejandro, Vargas-Rosales, Cesar, Inzunza-González, Everardo, Flores-Hernández, Leonardo
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Code Division Multiple Access
Communication
Conditioning
crest factor reduction
Digital integrated circuits
Distribution functions
Efficiency
Electric power distribution
Field programmable gate arrays
FPGA
Internet of Things
LTE
Methods
Orthogonal Frequency Division Multiplexing
PAPR
power amplifier
Power amplifiers
Radio frequency
Receivers & amplifiers
Signal processing
Telecommunications systems
Transceivers
Transmitters
Waveforms
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Summary:The signal conditioning treatment to achieve good relation of power with radio-frequency (RF) conversion in conventional transceiver systems require precise baseband models. A developed framework is built to provide a demonstration of the modeling figures of merit with orthogonal frequency division multiplexing (OFDM) support under signal conditioning and transmission restrictions to waveforms with high peak to average power ratio (PAPR) in practical applications. Therefore, peak and average power levels have to be limited to correct high PAPR for a better suited correction power from the amplifier that can lead to compression or clipping in the signal of interest. This work presents an alternative joint crest factor reduction (CFR) algorithm to correct the performance of PAPR. A real-time field-programmable gate array (FPGA) testbed is developed to characterize and measure the behavior of an amplifier using a single-carrier 64-QAM OFDM based on long-term evolution (LTE) downlink at 2.40 GHz as stimulus, across wide modulation bandwidths. The results demonstrate that the CFR accuracy capabilities for the signal conditioning show a reliable clipping reduction to give a smooth version of the clipping signal and provide a factor of correction for the unwanted out-of-band emission validated according to the adjacent channel power ratio (ACPR), PAPR, peak power, complementary cumulative distribution function (CCDF), and error vector magnitude (EVM) figures of merit.
ISSN:1424-8220
1424-8220
DOI:10.3390/s22031176