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Effect of Cell Shape on Design of CDMA Systems for Urban Microcells
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- Authors
- Seung Wook Min, Hassan M. El-Sallabi, Henry L. Bertoni
- Issue Date
- 2006-10
- Citation
- IEEE Transactions on Wireless Communications, v.5, no.10, pp.2805-2813
- ISSN
- 1536-1276
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- Placing antennas of low power base stations below surrounding buildings, as in urban microcells, makes propagation characteristics strongly dependent on the building environment. As a result, propagation in these urban microcells is non-isotropic, so that the assumption of circular cells used in planning of conventional cellular systems is no longer valid. Assuming circular cells leads to a more conservative system design, implying more base stations. This work investigates the effect of cell shape, due to non-isotropic propagation, on the out-of-cell interference and Erlang capacity of CDMA system. Propagation is described by measurement derived models for low antennas in a rectangular urban street grid. The analysis is done for soft handoff protocols. © 2006 IEEE.
- KSP Keywords
- Building environment, CDMA systems, Cellular system, Conservative system, Erlang capacity, Handoff protocols, Low-Power, Propagation characteristics, Urban street, base station(BS), cell shape