NN-Based Joint Mitigation of IQ Imbalance and PA Nonlinearity With Multiple States
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866912364494848000 |
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| author | Zhang, Yundi Cheng, Wendong Chen, Li |
| author_facet | Zhang, Yundi Cheng, Wendong Chen, Li |
| contents | Joint mitigation of IQ imbalance and PA nonlinearity is important for improving the performance of radio frequency (RF) transmitters. In this paper, we propose a new neural network (NN) model, which can be used for joint digital pre-distortion (DPD) of non-ideal IQ modulators and PAs in a transmitter with multiple operating states. The model is based on the methodology of multi-task learning (MTL). In this model, the hidden layers of the main NN are shared by all signal states, and the output layer's weights and biases are dynamically generated by another NN. The experimental results show that the proposed model can effectively perform joint DPD for IQ-PA systems, and it achieves better overall performance within multiple signal states than the existing methods. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_04373 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | NN-Based Joint Mitigation of IQ Imbalance and PA Nonlinearity With Multiple States Zhang, Yundi Cheng, Wendong Chen, Li Systems and Control Joint mitigation of IQ imbalance and PA nonlinearity is important for improving the performance of radio frequency (RF) transmitters. In this paper, we propose a new neural network (NN) model, which can be used for joint digital pre-distortion (DPD) of non-ideal IQ modulators and PAs in a transmitter with multiple operating states. The model is based on the methodology of multi-task learning (MTL). In this model, the hidden layers of the main NN are shared by all signal states, and the output layer's weights and biases are dynamically generated by another NN. The experimental results show that the proposed model can effectively perform joint DPD for IQ-PA systems, and it achieves better overall performance within multiple signal states than the existing methods. |
| title | NN-Based Joint Mitigation of IQ Imbalance and PA Nonlinearity With Multiple States |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2505.04373 |