Concurrent dual‐band digital predistortion implemented with reduced look‐up‐tables. Issue 12 (1st June 2017)

• Record Type: Journal Article
• Authors: Zhang, Qian; Chen, Wenhua; Feng, Zhenghe
• Is Part Of: Electronics letters. Volume 53:Issue 12(2017)
• Page Start: 802
• Page End: 804
• Publication Date: 2017-06-01
• Subjects: table lookup -- power amplifiers; concurrent dual‐band digital predistortion -- reduced look‐up‐table -- concurrent dual‐band power amplifier -- reduced sampling rate -- PA characteristics -- shared model coefficient -- dual‐band DPD technique -- adjacent channel power ration performance -- reduced LUT; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.0787
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A reduced look‐up‐tables (LUTs) implementation of digital predistortion (DPD) for concurrent dual‐band power amplifiers (PAs) is proposed. In the proposed method, the dual‐band output is captured jointly with reduced sampling rate, then the PA characteristics of the lower band and the upper band are identified with a group of shared model coefficients, thus DPD can be implemented with shared LUTs for the two bands, which results in reducing the LUTs by 50% comparing with those traditional dual‐band DPD techniques implemented with individual LUTs for each band. Experimental results show that the proposed method can achieve better than −48.2 dBc adjacent channel power ration performance with reduced LUTs.