TY - GEN
T1 - Impact of the number of users on error probabilities in multiuser diversity systems
AU - Ko, Youngwook
AU - Tepedelenlioglu, Cihan
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Multiuser diversity gain has been investigated well in terms of a system capacity formulation in the literature. In practice, however, designs on multiuser systems with nonzero error rates require a relationship between the error rates and the number of users within a cell. Considering a best-user scheduling, where the user with the best channel condition is scheduled to transmit per scheduling interval, our focus is on the uplink. We assume that each user communicates with the base station through a single-input multiple-output channel. We derive a closed-form expression for the average BER, and analyze how the average BER goes to zero asymptotically as the number of users increases for a given SNR. Note that the analysis of average BER even in SISO multiuser diversity systems has not been done with respect to the number of users for a given SNR. Our analysis can be applied to multiuser diversity systems with any number of antennas.
AB - Multiuser diversity gain has been investigated well in terms of a system capacity formulation in the literature. In practice, however, designs on multiuser systems with nonzero error rates require a relationship between the error rates and the number of users within a cell. Considering a best-user scheduling, where the user with the best channel condition is scheduled to transmit per scheduling interval, our focus is on the uplink. We assume that each user communicates with the base station through a single-input multiple-output channel. We derive a closed-form expression for the average BER, and analyze how the average BER goes to zero asymptotically as the number of users increases for a given SNR. Note that the analysis of average BER even in SISO multiuser diversity systems has not been done with respect to the number of users for a given SNR. Our analysis can be applied to multiuser diversity systems with any number of antennas.
KW - Multiuser diversity
KW - Multiuser systems
KW - Scheduling
KW - Single-Input Multiple-Output (SIMO)
KW - Uplink
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U2 - 10.1109/CISS.2007.4298372
DO - 10.1109/CISS.2007.4298372
M3 - Conference contribution
AN - SCOPUS:44049107430
SN - 1424410371
SN - 9781424410378
T3 - Forty-first Annual Conference on Information Sciences and Systems, CISS 2007 - Proceedings
SP - 566
EP - 569
BT - Forty-first Annual Conference on Information Sciences and Systems, CISS 2007 - Proceedings
T2 - 41st Annual Conference on Information Sciences and Systems, CISS 2007
Y2 - 14 March 2007 through 16 March 2007
ER -