On Deep Learning-Based Massive MIMO Indoor User Localization. 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 1-5, June 2018. [PUMA: multiple-output myown from:sdnr (artificial multiplex;complex communication;neural networks;Training;Antenna estimation;gradient system;Artificial descent modulation;deep intelligence);MIMO massive indoor localization;deep arrays;Antenna networks;multiple-input methods;learning user measurements;OFDM;Machine neural frequency systems;gradient channel learning learning-based training coefficients;indoor division nets;OFDM optimization;two-step positioning MIMO procedure;OFDM user;orthogonal]