研究目的
To propose a hybrid two-box model (HTB) for jointly compensating the I/Q imbalance and concurrent dual-band PA nonlinear distortion in wireless transmitters, aiming to reduce complexity and improve linearization performance.
研究成果
The proposed HTB model effectively compensates for I/Q imbalance and concurrent dual-band PA distortion, demonstrating lower complexity and superior linearization performance compared to conventional models. Experimental results validate the model's effectiveness in improving ACPR and NMSE metrics.
研究不足
The study focuses on specific I/Q imbalance conditions and a particular type of PA (GaN PA based on the CGH40006P transistor). The applicability of the HTB model to other types of PAs or under different imbalance conditions is not explored.
1：Experimental Design and Method Selection:
The study employs a hybrid two-box model (HTB) for joint compensation of I/Q imbalance and PA distortion. The model is based on the characteristics of I/Q imbalance in concurrent dual-band transmitters.
2：Sample Selection and Data Sources:
An online measurement setup (RF WebLab) is utilized for evaluating the proposed method, involving a vector signal transceiver (PXIe-5646R VST) and a GaN PA DUT.
3：List of Experimental Equipment and Materials:
Equipment includes a vector signal transceiver (PXIe-5646R VST) and a GaN PA based on the CGH40006P transistor.
4：Experimental Procedures and Operational Workflow:
The DUT is driven by specific 3GPP UMTS signals under set I/Q imbalance conditions. The performance of different models is compared based on power spectral density (PSD) and adjacent channel power ratio (ACPR).
5：Data Analysis Methods:
The analysis involves comparing the PSD of the PA output using different models and evaluating ACPR values and NMSE for performance assessment.
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