Journal
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
Volume 25, Issue 7, Pages 1333-1344Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSAC.2007.070907
Keywords
MIMO broadcast channels; sum-rate capacity; asymptotics; channel state information
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This paper studies the fundamental limits of MIMO broadcast channels from a high level, determining the sum-rate capacity of the system as a function of system paramaters, such as the number of transmit antennas, the number of. users, the number of receive antennas, and the total transmit power. The crucial role of channel state information at the transmitter is emphasized, as well as the emergence of opportunistic transmission schemes. The effects of channel estimation errors, training, and spatial correlation are studied, as well as issues related to fairness, delay and differentiated rate scheduling.
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