Question: In a TDD system, what is the key performance indicator for determining the performance requirement of a Dedicated Channel (DCH) in Multipath fading Case 3 conditions?
Option 1: Signal-to-Noise Ratio (SNR)
Option 2: Throughput
Option 3: Block Error Ratio (BLER)
Option 4: Handover Success Rate
Explanation: The Block Error Ratio (BLER) measures the ratio of incorrectly received data blocks to total transmitted blocks, directly reflecting a channel's reliability and efficiency under Multipath fading Case 3 conditions, making it the logical key performance indicator for DCH performance requirements.