@article{chen_wang_2004, 
  title={Suppressing Opposite-Direction Interference in TDD/CDMA Systems With Asymmetric Traffic by Antenna Beamforming}, 
  volume={53}, 
  DOI={10.1109/tvt.2004.830941}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Chen and Wang}, 
  year={2004}
  }