Question: For a UTRA FDD User Equipment (UE) supporting DB-DC-HSDPA, which of the following statements is true regarding the MIMO performance test for High Speed Physical Downlink Shared Channel (HS-DSCH) in multi-path fading environments?
Option 1: The test applies to all UTRA FDD UE regardless of their HSDPA UE capability categories.
Option 2: The test is mandatory only for Release 9 and earlier releases supporting DB-DC-HSDPA.
Option 3: The test applies to Release 10 and later releases, specifically for HSDPA UE capability categories 27-28.
Option 4: MIMO performance for HS-DSCH is determined by the signal-to-noise ratio (SNR) in single-path fading environments.
Explanation: This option is correct because, according to the specifications, the MIMO performance test for HS-DSCH in multi-path fading environments, as defined, is applicable to UTRA FDD UE that support DB-DC-HSDPA and specifically have HSDPA UE capability categories of 27-28, starting from Release 10 onwards. This ensures that high-speed data transmission capabilities are optimized for newer releases with advanced category support.