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Forward Link Capacity of Hierarchically Structured Cellular CDMA Systems with Isolated Microcells (Hotspots)
Seyed-Ali GHORASHI Fatin SAID A. Hamid AGHVAMI
IEICE TRANSACTIONS on Communications
Publication Date: 2003/05/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
hierarchical cell structure, forward link capacity, macrocell/microcell, DS-CDMA,
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The forward link capacity plane of a hierarchically structured cellular CDMA system, in which a single frequency band is used for both macrocell and microcell layers, is obtained for isolated microcells (hotspots). The impact of each neighbour microcell and macrocell on the capacity plane, for a reference mobile station as the worst case, is also investigated. The results for the case of three microcells in each macrocell show that 69% of macrocell interference to microcell mobile stations comes from the closest macrocell. It is also found that 80% of macrocell interference to the reference macrocell mobile station comes from the central cell and the first cell tier around it.