Question: What is the nominal channel spacing between two adjacent E-UTRA carriers, as defined by the 3GPP specification?
Option 1: (BWChannel(1) + BWChannel(2))/2
Option 2: BWChannel(1) - BWChannel(2)
Option 3: BWChannel(1) + BWChannel(2)
Option 4: The minimum of BWChannel(1) and BWChannel(2)
Explanation: According to the 3GPP specification, the nominal channel spacing between two adjacent E-UTRA carriers is calculated as the average of the channel bandwidths of the two respective E-UTRA carriers. This ensures that the channel spacing is optimized for the specific deployment scenario and frequency block available.