@inproceedings{yang_geller_wei_2009, 
  title={Approximate Expressions for Cramer-Rao Bounds of Code Aided QAM Dynamical Phase Estimation}, 
  DOI={10.1109/icc.2009.5198756}, 
  publisher={IEEE}, 
  author={Yang and Geller and Wei}, 
  year={2009}
  }