3-D distributed memory polynomial behavioral model for concurrent dual-band envelope tracking power amplifier linearization
PublisherIEEE Microwave Theory and Techniques Society
Rights accessOpen Access
This paper presents a new 3-D behavioral model to compensate for the nonlinear distortion arising in concurrent dual-band (DB) Envelope Tracking (ET) Power Amplifiers (PAs). The advantage of the proposed 3-D distributed memory polynomial (3D-DMP) behavioral model, in comparison to the already published behavioral models used for concurrent dual-band envelope tracking PA linearization, is that it requires a smaller number of coefficients to achieve the same linearity performance, which reduces the overall identification and adaptation computational complexity. The proposed 3D-DMP digital predistorter (DPD) is tested under different ET supply modulation techniques. Moreover, further model order reduction of the 3D-DMP DPD is achieved by applying the principal component analysis (PCA) technique. Experimental results are shown considering a concurrent DB transmission of aWCDMA signal at 1.75GHz and a 10-MHz bandwidth LTE signal at 2.1 GHz. The performance of the proposed 3D-DMP DPD is evaluated in terms of linearity, drain power efficiency, and computational complexity.
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CitationGilabert, Pere L., Montoro, G. 3-D distributed memory polynomial behavioral model for concurrent dual-band envelope tracking power amplifier linearization. "IEEE transactions on microwave theory and techniques", 01 Febrer 2015, vol. 63, núm. 2, p. 638-648.