ge obtained in the link budget. This implies that we use hexagonal sectors with base stations placed in the corners of the hexagons. Coverage analysis can thus apply to tri-sectored antennas for macrocells and with omnidirectional antennas for microcell and picocell coverage. Before describing the actual reference parameters for the link budgets in Table 7.7, in the following we provide a generic background of the analysis steps for the forward and reverse links. 7.6.6.1 The Forward Link Applying the logic for the traffic channels analysis in Ref. [2], to the Dedicated Physical Control Channel (DPCCH) and Dedicated Physical Data Channel (DPDCH) we can formulate a generic Eb/No for the forward link in a multi-cellular environment. Starting from a single cell with a single mobile station (MS), (7.10) No 1 + I + N N where Po is the BS sector traffic channel ERP in the direction of the MS within a given antenna pattern with its angle Oo, L equal to the path loss from the home BS in the di- rection of O within a given distance, AG is the receive antenna gain the MS, In is equals to the interference power received at the MS from non-CDMA origins, N is the thermal noise power, G is the processing gain, and Ib can be defined as: (7.11) where E is the orthogonality factor, P' is the home BS excess ERP (e.g. paging, sync powers, etc.) in the direction of the MS under consideration. In the presence of many cells and single MS, interference originates from the powers of the surrounding BSs, in addition to the excess powers of its own cell. Thus, we intro- duce the interference from the surrounding as Io: The UMTS Network and Radio Access Technology When looking at a single cell with many MSs, the BS serves all MSs plus the MS under consideration. Therefore, the latter gets the interference from the DL powers aimed at the other MSs. We denote this additional interference as Im: (7.12) where again E is the orthogonality factor and Pi is the forward traffic channel ERP aimed for MS i, but radiated to the desired MS measuring Eb