ACS-2009-04 - Lecture Topics Introduction The cellular...

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1 Lecture Topics Introduction The cellular concept Frequency reuse concept Determining cellular size Cell cluster geometry Co-channel interference Design principles Handoff (Handover) Cell splitting
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2 Frequency Reuse Concept D f 1 f 1 R R with the concept of “Frequency Reuse” comes the term “Co-channel Interference” desired signal undesired signal co-channel interference
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3 Distance between centre of two adjacent cells: D R R Notice the overlap of the two cells and therefore D does not equal 2xR
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4 Cell clusters: 2 3 1 Note: some textbooks use K instead of N 1 2 4 3 4 1 3 6 5 2 7 N = 3 N = 4 N = 7 No frequency reuse within the cluster
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5 Cell clusters: The actual channel frequency for each cell is selected on the basis of a frequency management plan Ref: 2
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6 3 1 2 4 4 2 3 3 1 1 4 2 1 4 2 2 4 D R The reuse distance D is measured from cell centre to cell centre N = 4 Cluster
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7 2 1 2 0 1 2 1 2 2 0 2 1 2 30 sin 30 cos u u v v u u D 0 1 2 30 cos u u 0 1 2 30 sin u u 1 2 v v x v u C1 C2 u 2 v 2 u 1 v 1 30 o u 2 u 1 v 2 v 1 D 30 o
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  • Three '16
  • Frequency, Cellular network, Co-channel interference, frequency reuse distance, frequency reuse concept

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