Question: In a 3GPP-defined FDD scenario, what is the primary focus of testing when a User Equipment (UE) receives a predefined test signal simulating a multi-path fading channel?
Option 1: To evaluate the UE's transmit power control under varying channel conditions.
Option 2: To assess the UE's ability to handover between different base stations in a multi-path environment.
Option 3: To verify the UE's single-code reception and channel encoding capabilities.
Option 4: To stress the UE's multi-code reception and channel decoding capabilities with incremental redundancy.
Explanation: The correct answer, Option 4, aligns with the test purpose described, which emphasizes testing the UE's ability to handle multi-code reception and channel decoding (with incremental redundancy) under simulated multi-path fading conditions. This is crucial for ensuring reliable data throughput in challenging wireless environments. Options 1, 2, and 3 are incorrect because they either focus on different aspects of wireless communication or do not accurately represent the primary test objective as outlined.