naa a22 4500 510791514 CHVBK 20180411083321.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0827-8 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0827-8 System Capacity Analysis and Antenna Placement Optimization for Downlink Transmission in Distributed Antenna Systems [Elektronische Daten] [Jin-Yuan Wang, Jun-Bo Wang, Ming Chen] System capacity and antenna placement play crucial roles in wireless communication systems, and they are of great value to network planning. In this paper, we are motivated to analyze the system capacity and optimize the antenna placement in distributed antenna systems. This paper establishes a composite channel model which takes path loss, lognormal shadowing and Rayleigh fading into consideration. To reduce the computational complexity, an approximate theoretical expression of system capacity is derived with selective transmission at the transmitter and maximal ratio combining at the receiver. An antenna placement optimization problem is formulated, and then a genetic algorithm (GA) based searching scheme is proposed to solve the proposed optimization problem. The computational complexity analysis indicates that the proposed GA-based searching scheme is computationally efficient in terms of both running time and storage space. Numerical results show that the approximate theoretical expression of system capacity can provide a very good approximation to the simulation results, and the proposed GA-based searching scheme for solving the antenna placement optimization problem can consistently offer a large capacity gain over other existing schemes. Springer Science+Business Media, LLC., 2012 Distributed antenna systems nationallicence System capacity nationallicence Antenna placement nationallicence Genetic algorithm nationallicence Selective transmission nationallicence Maximal ratio combining nationallicence Wang Jin-Yuan National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut Wang Jun-Bo National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut Chen Ming National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/1(2013-07-01), 531-554 0929-6212 71:1<531 2013 71 11277 https://doi.org/10.1007/s11277-012-0827-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0827-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Jin-Yuan National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Wang Jun-Bo National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Chen Ming National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/1(2013-07-01), 531-554 0929-6212 71:1<531 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer