Question: How is the Primary CPICH Power calculated when Transmit Diversity is applied to the Primary Common Pilot Channel (P-CPICH) in a UTRAN cell?
Option 1: It remains constant, irrespective of the number of branches used.
Option 2: It is the average power used for transmitting the P-CPICH across all branches.
Option 3: It is the maximum power used on any single branch for transmitting the P-CPICH.
Option 4: It is the linear sum of the power used for transmitting the P-CPICH on all branches.
Explanation: When Transmit Diversity is applied to enhance signal reception, the Primary CPICH is transmitted over multiple branches. To accurately represent the total transmission power in such a scenario, the calculation must consider the collective power output. Thus, the linear sum of the power used across all branches provides the comprehensive measure of Primary CPICH Power, reflecting the increased transmission capacity and coverage when diversity techniques are employed.