TY - GEN
T1 - Multiple antenna multiple user channels
T2 - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
AU - Boche, Holger
AU - Jorswieck, Eduard A.
PY - 2004
Y1 - 2004
N2 - We study the sum capacity of multiple antenna multi-user wireless channels. We assume that base station and mobiles have perfect channel state information (CSI). The optimal transmission strategy for the single-antenna multiple-access channel is to allocate power only for the best user [1]. If multiple antennas are used at the base station and further on at the mobiles, it turns out that more than one user is allowed to transmit in the same time slot. In addition to this, the number of active users depends on the SNR. The higher the SNR the more users are active. It can be shown that for SNR values below some threshold only one user is active. We analyse the low SNR behaviour and give necessary and sufficient conditions for this this threshold value. Finally, our development of the results is accompanied by many examples and illustrations and numerical simulations.
AB - We study the sum capacity of multiple antenna multi-user wireless channels. We assume that base station and mobiles have perfect channel state information (CSI). The optimal transmission strategy for the single-antenna multiple-access channel is to allocate power only for the best user [1]. If multiple antennas are used at the base station and further on at the mobiles, it turns out that more than one user is allowed to transmit in the same time slot. In addition to this, the number of active users depends on the SNR. The higher the SNR the more users are active. It can be shown that for SNR values below some threshold only one user is active. We analyse the low SNR behaviour and give necessary and sufficient conditions for this this threshold value. Finally, our development of the results is accompanied by many examples and illustrations and numerical simulations.
KW - MIMO Systems
KW - Medium Access control
KW - Space-Time Processing
UR - http://www.scopus.com/inward/record.url?scp=4544325176&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:4544325176
SN - 0780383443
SN - 9780780383449
T3 - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
SP - 513
EP - 518
BT - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
Y2 - 21 March 2004 through 25 March 2004
ER -