Self-correction phase noise compensation based on decision feedback in SC-FDE satellite systems

Single-carrier frequency-domain equalization (SC-FDE) occupies a concise transmitting structure and a low peak-to-average power ratio (PAPR). These advantages are conducive to the miniaturization of the satellite systems and increase the robustness to the non-linear distortion of amplifiers. Nowadays, satellite communication systems set out to work at Ka or higher frequency bands to support the high data rate links. With the continuously rising level of the frequency in satellite communications, the effect of phase noise (PHN) also keeps increasing. So it is important to estimate and compensate the PHN in the SC-FDE satellite systems. In this paper, we design a novel self-correction phase noise compensation (SC-PNC) algorithm which is based on decision feedback in SC-FDE satellite systems. In the initial stage of our algorithm, with the aid of the receiver, the rough estimation of PHN is calculated by using the pilot signal, then the pilot rough compensation (PRC) is implemented. In the following self-correction stage, the feedback PHN is computed by the received and feedback signals. The inappropriate values are replaced according to the proposed self-correction threshold afterwards. Finally, the revised PHN compensates the received signal and we execute the front processes iteratively. The DVB-S2 and Wiener PHN models are considered in this paper. Experimental results show that the proposed algorithm can effectively improve the bit error rate (BER) performance.