Hardware-friendly power amplifier linearization in next-generation broadcasting systems

Bulusu, S. S. Krishna Chaitanya; Zampato, Silvia; Susarla, Praneeth; Tervo, Nuutti; Pärssinen, Aarno; Sílven, Olli
 
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https://doi.org/10.1109/MeditCom58224.2023.10266599

Bulusu, S. S. Krishna Chaitanya
Zampato, Silvia
Susarla, Praneeth
Tervo, Nuutti
Pärssinen, Aarno
Sílven, Olli
Institute of Electrical and Electronics Engineers

S. S. Krishna Chaitanya Bulusu, S. Zampato, P. Susarla, N. Tervo, A. Pärssinen and O. Sílven, "Hardware-friendly Power Amplifier Linearization in Next-Generation Broadcasting Systems," 2023 IEEE International Mediterranean Conference on Communications and Networking (MeditCom), Dubrovnik, Croatia, 2023, pp. 299-304, doi: 10.1109/MeditCom58224.2023.10266599.

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doi:https://doi.org/10.1109/meditcom58224.2023.10266599
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https://urn.fi/URN:NBN:fi-fe20231013139996
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Abstract

It is essential to mitigate power amplifier (PA) nonlinear (NL) effects to achieve energy-efficient radio communications. To restore the transmit signal quality, digital pre-distortion (DPD) is widely used. Recently, fast convergence DPD (FC-DPD) which offers good PA linearization has been proposed for next-generation broadcasting systems. However, it suffers from complexity issues and this paper addresses that drawback and we propose a low-complex version to make it hardware-friendly. We achieve significant complexity reduction by simplifying the Jacobian computation needed in the FC-DPD algorithm. This scheme can be extended to any memory-less PA model or a measured PA fitted to a polynomial model. We have provided proof that the proposed technique has linear complexity and the simulation results indicate that the proposed scheme achieves performance close to the FC-DPD algorithm. This method can be applied to other transmission systems as well.

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