Transmit Precoding for MIMO-BICM-ID Satellite Systems with Nonlinear Power Amplifiers
Conference: WSA 2013 - 17th International ITG Workshop on Smart Antennas
03/13/2013 - 03/14/2013 at Stuttgart, Deutschland
Proceedings: WSA 2013
Pages: 8Language: englishTyp: PDF
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Authors:
Delamotte, Thomas (Institute of Information Processing, Universität der Bundeswehr München, 85577 Neubiberg, Germany)
Bauch, Gerhard (Institute of Communications, Technische Universität Hamburg-Harburg, 21073 Hamburg, Germany)
Dantona, Vito; Lankl, Berthold (Institute of Communications Engineering, Universität der Bundeswehr München, 85577 Neubiberg, Germany)
Abstract:
For power efficiency, High Power Amplifiers (HPAs) used in satellite communications must be operated as close as possible to saturation. This constraint especially results in nonlinear amplitude distortions of the transmit signals. In this paper, the impact of these distortions on the performance of a linearly precoded 2 × NR Multiple-Input-Multiple-Output (MIMO) Single Carrier Geostationary Earth Orbit (GEO) satellite system operated for fixed satellite services (FSS) and using PSK modulation is analyzed. In order to combine channel coding and modulation, a Bit-Interleaved-Coded-Modulation with Iterative Decoding (BICM-ID) scheme is considered. Through EXIT charts and BER simulations, it is shown that a phase precoder which aims at maximizing the input-output mutual information and doesn’t increase the Peak-to-Average-Power-Ratio (PAPR) of the transmit signals, is a robust strategy in this context when QPSK symbols are used for bit-to-symbol mapping.