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In this paper, a new receiver structure that is intended to detect thesignals from multiple adjacent satellites in the presence of other interferingsatellites is proposed. We tackle the worst case interference conditions, i.e.,it is assumed that uncoded signals that fully overlap in frequency arrive at amultiple-element small-size parabolic antenna in a spatially correlated noiseenvironment. The proposed successive interference cancellation (SIC) receiver,denoted by SIC Hy/ML, employs hybrid beamforming and disjoint maximumlikelihood (ML) detection. Depending on the individual signals spatialposition, the proposed SIC Hy/ML scheme takes advantage of two types ofbeamformers: a maximum ratio combining (MRC) beamformer and a compromised arrayresponse (CAR) beamformer. The performance of the proposed receiver is comparedto an SIC receiver that uses only MRC beamforming scheme with ML detection forall signals, a joint ML detector, and a minimum mean square error detector. Itis found that SIC Hy/ML outperforms the other schemes by a large margin.

Overloaded Satellite Receiver Using SIC with Hybrid Beamforming and ML Detection