Overloaded Satellite Receiver Using SIC with Hybrid Beamforming and ML Detection
In this paper, a new receiver structure that is intended to detect the signals from multiple adjacent satellites in the presence of other interfering satellites is proposed. The authors tackle the worst case interference conditions, i.e., it is assumed that uncoded signals that fully overlap in frequency arrive at a multiple-element small-size parabolic antenna in a spatially correlated noise environment. The proposed Successive Interference Cancellation (SIC) receiver, denoted by SIC Hy/ML, employs hybrid beamforming and disjoint Maximum Likelihood (ML) detection. Depending on the individual signals spatial position, the proposed SIC Hy/ML scheme takes advantage of two types of beamformers: a Maximum Ratio Combining (MRC) beamformer and a Compromised Array Response (CAR) beamformer.