초록 ▼

In cellular mobile radiotelephone systems employing reuse of a predetermined set of channels in adjacent iterations of a pattern of cells (FIG. 1), average signal-to-interference ratio in at least one cell region of interest is improved by tilting the antenna (11,12) gain pattern center-beam line of

In cellular mobile radiotelephone systems employing reuse of a predetermined set of channels in adjacent iterations of a pattern of cells (FIG. 1), average signal-to-interference ratio in at least one cell region of interest is improved by tilting the antenna (11,12) gain pattern center-beam line of an antenna serving that region below the horizontal (FIG. 3). In one embodiment the tilt (q8) in the center-beam portion of the pattern.

대표청구항 ▼

In a cellular mobile radiotelephone system in which a given set of radio channels is assigned for use in a predetermined adjacent-cell pattern (FIG. 1), which pattern is iteratively employed for providing radiotelephone service to a mobile service area, each cell having predetermined nominal boundar

In a cellular mobile radiotelephone system in which a given set of radio channels is assigned for use in a predetermined adjacent-cell pattern (FIG. 1), which pattern is iteratively employed for providing radiotelephone service to a mobile service area, each cell having predetermined nominal boundaries and being served through at least one antenna site (31) in the cell, the improvement comprising means (16) for operating an antenna (11,12) site (31) to produce in a predetermined region of a cell served thereby radiation such that a vertical-plane center-beam line of approximately maximum antenna gain is tilted to a predetermined angle (q