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Joint Mitigation of IQ Imbalance and Power Amplifier Impairments by Real Valued Time Delay Neural Networks
Date
2019-08-22
Author
Yeşil, Soner
Gürtunca, Burak
Yılmaz, Ali Özgür
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
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This paper represents a neural network based joint mitigation of the IQ imbalance and power amplifier nonlinearities that cause degradation in the transmit signal quality of the wireless communication systems. A Real Valued Time Delay Neural Network architecture for this purpose has been verified on a hardware including cascaded NXP-MD8IC925 and NXPBLF8G10LS power amplifier components performing a total of 46dB gain. The test setup has been controlled over MATLAB in order to have a closed loop adaptive digital predistortion. The test results showed approximately 24dB, 19dB and 14dB performance improvements for the in-band, first and second adjacent channels, respectively.
Subject Keywords
RVTDNN
,
IQ imbalance
,
joint mitigation
,
Digital Predistortion
URI
https://hdl.handle.net/11511/57984
DOI
https://doi.org/10.1109/siu.2019.8806283
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar