@INPROCEEDINGS{07plz-vtc,
  author = {Jiyong Pang and Jiandong Li and Linjing Zhao and Zhuo Lu},
  title = {Optimal Training Sequences for {MIMO} Channel Estimation with Spatial Correlation},
  booktitle = {Proc. of IEEE Vehicular Technology Conference (VTC)},
  year = {2007}
}