@inproceedings {246282, author = {Venkat Arun and Hari Balakrishnan}, title = {{RFocus}: Beamforming Using Thousands of Passive Antennas }, booktitle = {17th USENIX Symposium on Networked Systems Design and Implementation (NSDI 20)}, year = {2020}, isbn = {978-1-939133-13-7}, address = {Santa Clara, CA}, pages = {1047--1061}, url = {https://www.usenix.org/conference/nsdi20/presentation/arun}, publisher = {USENIX Association}, month = feb }