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Downlink performance and capacity of distributed antenna systems based on realistic channel model

Nima Seifi (Institutionen för signaler och system, Kommunikationssystem) ; Andreas Wolfgang (Institutionen för signaler och system, Kommunikationssystem) ; Tony Ottosson (Extern ; Institutionen för signaler och system, Kommunikationssystem)
WSA 2008. International ITG Workshop on Smart Antennas, Damstdart, Germany p. 249-253. (2008)
[Konferensbidrag, refereegranskat]

Recent academic studies of distributed antenna system (DAS) using a frequency-flat fading channel model show that DAS outperforms standard systems, where the base-station (BS) antenna elements are centralized at one location. In this paper the performance of a DAS under time-varying frequency-selective fading based on a realistic channel model is investigated. Specifically, we show that if we shift the hexagonal cellular layout in the conventional system and use sectorized antennas instead of omnidirectional antennas at each BS, the performance in terms of outage probability and outage capacity will improve by a large extent without a need for additional BS towers. The results show that with the same total transmit power and bandwidth DAS can reduce the inter-cell interference (ICI) in a multicell environment and improve the outage capacity especially near the cell boundary.

Nyckelord: cellular radio, directive antennas, fading channels, probability, time-varying channelsBS towers, base-station antenna elements, distributed antenna systems, frequency-flat fading channel model, hexagonal cellular layout, intercell interference, multice

Denna post skapades 2009-01-05. Senast ändrad 2010-08-31.
CPL Pubid: 83443


Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem



Chalmers infrastruktur