Co-Channel Interference Quiz

What is co-channel interference and how is it generated?

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What happens when K is increased beyond 7 in a mobile radio environment?

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What are the four conditions used for comparing C/I and C/N ratios?

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What is the significance of the carrier to interference ratio (C/I) in a cellular system?

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What is the worst-case scenario for co-channel interference in a directional antenna system?

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How does the use of directional antennas affect the number of principal interferers?

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What are the advantages and disadvantages of using 600 sector antennas compared to 1200 sector antennas?

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What are the challenges of using 600 sectors in small cells?

• They require more antennas to be mounted on the antenna mast.

• They often require more frequent hand offs because of increase of chance of the mobile units travel across the six sectors of the cell.

• Assigning the frequency channel to the mobile unit in each sector is more difficult unless the antenna height at the cell site is increased.

• The directional antenna front-to-back ratio is difficult to predict.

What is the effect of lowering the antenna height on a high hill?

• It reduces co-channel and adjacent channel interference.

• It increases the effective antenna height.

• It does not reduce the received power at the cell site or mobile unit.

• It improves the directional antenna front-to-back ratio.

What is the impact of lowering the antenna height in a valley?

• It is effective in reducing the radiated power in a distant high elevation area.

• The effective antenna height is the same as the actual antenna height.

• It increases the received power at the cell site.

• It has no effect on interference.