Question: For a UTRA FDD User Equipment (UE) supporting High Speed Downlink Packet Access (HSDPA), which of the following statements is true regarding the receiver closed loop transmit diversity performance test for the High Speed Physical Downlink Shared Channel (HS-DSCH)?
Option 1: The test applies to all UE categories but only for Release 5 and earlier.
Option 2: The test is mandatory for UE capability categories 11 and above, starting from Release 7.
Option 3: The performance is determined by the signal-to-noise ratio (SNR) in single-path fading environments.
Option 4: The requirements apply to Releases 6 and later, covering UE capability categories 1 through 10 for enhanced performance type 1.
Explanation: This option is correct because the test's applicability begins with Release 6 and includes all UTRA FDD UEs that support HSDPA across a broad range of UE capability categories (1-10), particularly highlighting those with optional enhanced performance requirements type 1, ensuring robust receiver closed loop transmit diversity performance in challenging multi-path fading environments.