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@article{TUW-281114,
    author = {Schwarz, Stefan and Rupp, Markus and Wesemann, Stefan},
    title = {Grassmannian Product Codebooks for Limited Feedback Massive MIMO with Two-Tier Precoding},
    journal = {IEEE Journal of Selected Topics in Signal Processing},
    year = {2019},
    volume = {13},
    number = {5},
    pages = {1119--1135},
    url = {https://publik.tuwien.ac.at/files/publik_281114.pdf},
    doi = {10.1109/JSTSP.2019.2930890},
    keywords = {Limited feedback, Grassmannian quantization, massive MIMO, product codebook, FDD, FD-MIMO}
}