Why are frequencies in adjacent cells different?Question 1Answera.efficient signal utilizationb.avoid fadingc.avoid crosstalkd.improve call handoff

The frequencies in adjacent cells are different primarily to avoid interference or crosstalk. Here's a step-by-step explanation:

1. Efficient Signal Utilization: Different frequencies allow for better use of the available spectrum. Each cell uses a different set of frequencies from its neighboring cells to avoid any overlap and interference.

2. Avoid Fading: Fading is a phenomenon where the signal strength decreases due to various factors like distance, obstacles, etc. By using different frequencies in adjacent cells, the effect of fading can be minimized as each cell will have its own unique frequency and won't be affected by the fading of the neighboring cell's frequency.

3. Avoid Crosstalk: Crosstalk is a form of interference where a signal transmitted on one channel creates an undesired effect on another channel. By using different frequencies in adjacent cells, the chances of crosstalk happening are significantly reduced.

4. Improve Call Handoff: When a mobile device moves from one cell to another, the call is handed off from the current cell to the new cell. If the adjacent cells were using the same frequency, there would be a high chance of call drop or poor call quality during this handoff. Different frequencies ensure a smooth and seamless handoff.