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Sum capacity of the vector Gaussian broadcast channel and uplink-downlink duality

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2 Author(s)
Viswanath, P. ; Dept. of Electr. & Comput. Eng., Univ. of Illinois, Urbana-Champaign, IL, USA ; Tse, D.N.C.

We characterize the sum capacity of the vector Gaussian broadcast channel by showing that the existing inner bound of Marton and the existing upper bound of Sato are tight for this channel. We exploit an intimate four-way connection between the vector broadcast channel, the corresponding point-to-point channel (where the receivers can cooperate), the multiple-access channel (MAC) (where the role of transmitters and receivers are reversed), and the corresponding point-to-point channel (where the transmitters can cooperate).

Published in:

Information Theory, IEEE Transactions on  (Volume:49 ,  Issue: 8 )

Date of Publication:

Aug. 2003

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