COMPUTER NETWORKS AND COMMUNICATIONS
WIRELESS COMMUNICATION TECHNOLOGIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Frequency allocation of nearest cells
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Distance between the centers of the cochannel cells
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Radius of the cell
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Both a & b
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Detailed explanation-1: -Explanation: Co-channel reuse ratio is defined by Q=D/R. By increasing the ratio of D/R, the spatial separation between co-channel cells relative to the coverage distance of a cell is increased.
Detailed explanation-2: -The co-channel interference ratio depends on: • The radius of the cell (R) • The distance between centers of the nearest co-channel cells (D). cell. Interference is reduced when Q is increased (improved isolation of RF energy from the co-channel cell).
Detailed explanation-3: -The channel sets are formed by dividing the total number of usable channels into N groups, (the cluster size), and is related to the displacement parameters (I, J) that identify co-channel cells by(1) N=I 2 + IJ+J 2 where I and J are non-negative integers with I ≥ J.
Detailed explanation-4: -The poor frequency reuse in cellular networks initiates co-channel interference and causes crosstalk. As the distance between the cells utilizing the same frequency range increases, the chances of crosstalk in mobile communication due to frequency reuse decreases.