Title :
Applicability of distributed transmit power control based on uplink-downlink duality to multi-user distributed antenna systems
Author :
Kumagawa, S. ; Yamamoto, Koji ; Murata, Hidekazu ; Yoshida, Sigeru ; Umehara, Daisuke ; Denno, Satoshi ; Morikura, Masahiro
Author_Institution :
Grad. Sch. of Inf., Kyoto Univ. Yoshida-honmachi, Kyoto, Japan
Abstract :
Transmit power control to minimize transmit power for multi-user distributed antenna systems (MU-DASs) is necessary to improve spectrum efficiency. In previous work, distributed transmit power control (DTPC) algorithm for cellular MIMO systems has been developed based on uplink-downlink duality. The performance of this DTPC algorithm in MU-DASs is evaluated in this paper because MU-DASs is different from cellular MIMO systems in terms of an effect of the co-channel interference (CCI). Computer simulations show that the sum of transmit power is decreased because of uplink-downlink duality assumption. In addition to this, an advantage of MU-DAS is shown. However, it is shown that the sum of transmit power is not always minimized without optimization of clustering.
Keywords :
MIMO communication; antennas; cellular radio; cochannel interference; multi-access systems; CCI; DTPC algorithm; MU-DAS; cellular MIMO systems; cochannel interference; distributed transmit power control; multi-user distributed antenna systems; uplink-downlink duality; Antenna arrays; Clustering algorithms; Convergence; Interference; Power control; Signal to noise ratio; Wireless communication;
Conference_Titel :
Communication Systems (ICCS), 2012 IEEE International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-2052-8
DOI :
10.1109/ICCS.2012.6406202
