Question

If voice activity interference reduction factor is 2.5, antenna sectorization gain factor is 2.5 and interference increase factor is 1.6, then the performance improvement factor in CDMA digital cellular system is
1. 1.2
2. 2.5
3. 3.1
4. 3.9
5.

Answer 1

Correct Answer - Option 4 : 3.9

Concept:

The performance improvement factor is defined as:

\(Performance\; improvement\; factor = \frac{G_V G_A}{P}\)

G_V: Voice interference reduction factor

G_A: Antenna sectoring factor

P: Interference increase factor

Calculation:

Given voice interference reduction factor and antenna resize factor is 2.5 and 2.5 respectively.

The interference factor is 1.6

\(Performance\; improvement\; factor = \frac{2.5 \times 2.5}{1.6}=3.90625\)

Performance improvement factor = 3.9