Joint Satellite-Transmitter and Ground-Receiver Digital Pre-Distortion for Active Phased Arrays in LEO Satellite Communications
نویسندگان
چکیده
A novel joint satellite-transmitter and ground-receiver (JSG) digital pre-distortion (DPD) (JSG-DPD) technique is proposed to improve the linearity power efficiency of space-borne active phased arrays (APAs) in low Earth orbit (LEO) satellite communications. Different from conventional DPD that requires a complex RF feedback loop, coefficients based on generalized memory polynomial (GMP) model are extracted at then transmitted baseband front-end LEO via satellite–ground bi-directional transmission link. The issue additive white Gaussian noise (AWGN) channel affecting extraction tackled using superimposing training sequences (STS) method. has been experimentally verified 28 GHz array. performance improvements terms error vector amplitude (EVM) adjacent ratio (ACPR) 7.5% 3.6 dB, respectively. Requiring limited resources, this offers promising solution achieve APA for
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14174319