@INPROCEEDINGS{6654745, author={Xiao, Liang and Yan, Qiben and Lou, Wenjing and Hou, Y. Thomas}, booktitle={2013 IEEE International Conference on Communications (ICC)}, title={Proximity-based security using ambient radio signals}, year={2013}, volume={}, number={}, pages={1609-1613}, doi={10.1109/ICC.2013.6654745}}