Co-Channel Interference Quiz

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

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

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

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

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

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

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

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.