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ISBN: 978-0-7695-3507-4
pp: 194-197
As for model-based approaches, the polynomial model is a favorite choice due to its simplicity and ease of implementation. In this paper, an odd-order series of magnitude and phase angle form are derived from polynomial model of HPA nonlinearity. In-band distortion can be eliminated by alleviating odd-order terms of the series. Different from conventional feedback predistortion, we use human-computer interface to cancel the odd-order terms that need no feedback loop, i.e. open-loop digital baseband predistortion. Results from both Matlab simulation and small power test show that the open-loop predistortion method can effectively compensate for amplitude and phase nonlinearity and suppress the in-band distortion.
open-loop, predistortion, polynomials
Zhibin Zeng, Xiangran Sun, Rui Lv, Zhanxin Yang, "Open-Loop Digital Baseband Predistortion Based on Polynomials", CSIE, 2009, Computer Science and Information Engineering, World Congress on, Computer Science and Information Engineering, World Congress on 2009, pp. 194-197, doi:10.1109/CSIE.2009.611
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