On the duality of Gaussian multiple-access and broadcast channels

  title={On the duality of Gaussian multiple-access and broadcast channels},
  author={Nihar Jindal and Sriram Vishwanath and Andrea J. Goldsmith},
  journal={IEEE Transactions on Information Theory},
We define a duality between Gaussian multiple-access channels (MACs) and Gaussian broadcast channels (BCs). The dual channels we consider have the same channel gains and the same noise power at all receivers. We show that the capacity region of the BC (both constant and fading) can be written in terms of the capacity region of the dual MAC, and vice versa. We can use this result to find the capacity region of the MAC if the capacity region of only the BC is known, and vice versa. For fading… CONTINUE READING
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On the duality between general multiple-access/broadcast channels

N. Jindal, S. Vishwanath, A. Goldsmith
Proc. IEEE Int. Symp. Information Theory, Yokohama, Japan, July 2003, p. 313. • 2003
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Sum power iterative water-filling for multi-antenna Gaussian broadcast channels

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