Summary

This paper evaluates the comparative performance with regard to atmospheric turbulence in Free Space Optic (FSO) communications of a multimode receiver based upon coherent combination and a single-model receiver.  Focus is on optical links from a GEO satellite to an Optical Ground Station (OGS).  The paper concludes that multimode receivers perform better in atmospheric turbulence with lower power penalty at a given BER.  The paper stresses that the number of modes considered for the multimode receiver is critical to optimize the performance of the receiver.

References

https://arxiv.org/ftp/arxiv/papers/2208/2208.08869.pdf

https://arxiv.org/pdf/2208.08869