Open AccessMultiple‐input multiple‐output symbol rate signal digital predistorter for non‐linear multi‐carrier satellite channels
Author(s) -
Zenteno Efrain,
Piazza Roberto,
Bhavani Shankar M.R.,
Rönnow Daniel,
Ottersten Björn
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2015.0176
Subject(s) - predistortion , computer science , communications satellite , channel (broadcasting) , signal (programming language) , distortion (music) , waveform , electronic engineering , algorithm , satellite , telecommunications , bandwidth (computing) , engineering , amplifier , radar , programming language , aerospace engineering
A digital predistortion (DPD) scheme is presented for non‐linear distortion mitigation in multi‐carrier satellite communication channels. The proposed DPD has a multiple‐input multiple‐output architecture similar to data DPD schemes. However, it enhances the mitigation performance of data DPDs using a multi‐rate processing algorithm to achieve spectrum broadening of non‐linear operators. Compared to single carrier (single‐input single‐output) signal (waveform) DPD schemes, the proposed DPD has lower digital processing rate reducing the required hardware cost of the predistorter. The proposed DPD outperforms, in total degradation, both data and signal DPD schemes. Further, it performs closest to a channel bound described by an ideally mitigated channel with limited maximum output power.