@article{popescu_2007, 
  title={Interference suppressing OFDM UWB system with multiple users and MMSE receivers}, 
  volume={11}, 
  DOI={10.1109/lcomm.2007.071374}, 
  number={12}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Popescu}, 
  year={2007}
  }