Question: What is the primary purpose of Intermodulation Response Rejection in a UTRA FDD UE receiver, especially relevant for devices supporting dual band 4C-HSDPA?
Option 1: To enhance the transmission power of the desired signal in the presence of multiple interfering signals.
Option 2: To measure the receiver's ability to filter out thermal noise generated by the device itself.
Option 3: To assess the UE's capacity for simultaneous multi-band operation without interference.
Option 4: To evaluate the receiver's capability to receive a wanted signal on its assigned channel frequency amidst two or more interfering signals with specific frequency relationships.
Explanation: Intermodulation Response Rejection is crucial in evaluating how well a UTRA FDD UE receiver can maintain signal integrity when faced with multiple interfering RF signals that could produce an interfering signal within the desired channel's band due to third and higher order mixing, impacting the device's ability to receive the intended signal clearly.