发明授权
- 专利标题: Cellular radiotelephone communications system
- 专利标题(中): 细胞无线电通信系统
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申请号: US402739申请日: 1989-09-05
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公开(公告)号: US5073971A公开(公告)日: 1991-12-17
- 发明人: Dennis R. Schaeffer
- 申请人: Dennis R. Schaeffer
- 申请人地址: IL Schaumburg
- 专利权人: Motorola, Inc.
- 当前专利权人: Motorola, Inc.
- 当前专利权人地址: IL Schaumburg
- 主分类号: H04B7/26
- IPC分类号: H04B7/26 ; H04W16/02 ; H04W16/12 ; H04W16/24
摘要:
A cellular radiotelephone communications system comprising a system of cells that are made up of an array of diretional sector antennas. These antennas are centrally located in the cell and radiates into a 60.degree. area of the cell. Each antenna in a cell has a group of frequencies assigned to it that is different than the group of frequencies assigned to the other antennas within that cell. These frequency groups are repeated either 2 or 8 times respectively in a 4 or 16 cell repeat pattern, effectively forming a two cell reuse pattern. The preferred embodiment of this invention is asymmetrically positioning the repeating frequency groups in an alternating fashion so that one row faces in the opposite direction of another row. The asymmetrical positioning of cells is possible only by departing from the prior art, cellular positioning rules. The positioning rules used in this invention create a 4 or 16 cell repeat pattern by locating co-channel cells closer in one direction than another.
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