Is amplify-and-forward practically better than decode-and-forward or vice versa?

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@article{Yu2005IsAP, title={Is amplify-and-forward practically better than decode-and-forward or vice versa?}, author={Meng Yu and Tiffany Jing Li}, journal={Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005.}, year={2005}, volume={3}, pages={iii/365-iii/368 Vol. 3} }