Computer Science and Information Engineering, World Congress on (2009)
Los Angeles, California USA
Mar. 31, 2009 to Apr. 2, 2009
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CSIE.2009.611
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
R. Lv, X. Sun, Z. Yang and Z. Zeng, "Open-Loop Digital Baseband Predistortion Based on Polynomials," 2009 WRI World Congress on Computer Science and Information Engineering, CSIE(CSIE), Los Angeles, CA, 2009, pp. 194-197.