This work proposes beamforming solutions to minimize system bit error rate (BER) for low earth orbit (LEO) satellite communications with non-orthogonal multiple access (NOMA). Designing beamformers to minimize BER in NOMA schemes is a nonlinear problem. We resort to the interior-point method to solve this problem, which can significantly improve the BER performance. To reduce computational complexity, we further propose another beamforming solution based on the projected gradient descent (PGD) scheme, which not only achieves comparable performance as the interior-point method but also greatly reduces the computational complexity. We evaluate the proposed beamforming schemes in a designed LEO satellite scenario. Simulation shows that the proposed system significantly outperforms conventional schemes in terms of BER.


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    Title :

    Beamforming Designs for BER Minimization in LEO Satellite Communications with NOMA


    Contributors:
    Yu, Chia-Hsin (author) / He, Yan-Yin (author) / Tsai, Shang-Ho (author) / Wu, Jen-Ming (author)


    Publication date :

    2024-06-24


    Size :

    552701 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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