Non-linear distortion noise cancellation for satellite return links

Abstract

In this paper, an iterative receiver that performs non-linear distortion noise cancellation is presented. The performance is assessed for time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA) waveforms for application over the satellite return link channel. The performance is assessed in terms of energy efficiency and spectral efficiency, where the total degradation (TD) of the received signal-to-noise ratio (SNR) is minimized. The modulation formats of the DVB-RCS2 satellite return link standard and a respective non-linear channel have been used. Two iterations of non-linear noise cancellation across the different modulation orders have shown the following total degradation gains: 1.1–2.5 dB in OFDMA, 0.3–1.1 dB in SC-FDMA, 0.1–0.8 dB in TDMA with 20% roll-off, and 0.2–1.9 dB in TDMA with 5% roll-off.