A Case For Amplify-Forward Relaying in the Block-Fading Multi-Access Channel
<|reference_start|>A Case For Amplify-Forward Relaying in the Block-Fading Multi-Access Channel: This paper demonstrates the significant gains that multi-access users can achieve from sharing a single amplify-forward relay in slow fading environments. The proposed protocol, namely the multi-access relay amplify-forward, allows for a low-complexity relay and achieves the optimal diversity-multiplexing trade-off at high multiplexing gains. Analysis of the protocol reveals that it uniformly dominates the compress-forward strategy and further outperforms the dynamic decode-forward protocol at high multiplexing gains. An interesting feature of the proposed protocol is that, at high multiplexing gains, it resembles a multiple-input single-output system, and at low multiplexing gains, it provides each user with the same diversity-multiplexing trade-off as if there is no contention for the relay from the other users.<|reference_end|>
@article{chen2007a,
    title={A Case For Amplify-Forward Relaying in the Block-Fading Multi-Access
  Channel},
    author={Deqiang Chen, Kambiz Azarian and J. Nicholas Laneman},
    journal={arXiv preprint arXiv:cs/0701053},
    year={2007},
    archivePrefix={arXiv},
    eprint={cs/0701053},
    primaryClass={cs.IT math.IT}
}