Question: In calculating the Code-Domain Power of a varied reference signal in a 3GPP-compliant FDD system, what is the primary purpose of normalizing the channelization code set vectors (Cnorm) by dividing them by the square root of the spreading factor (sf)?
Option 1: To amplify the signal for better transmission over long distances.
Option 2: To ensure compatibility with older network infrastructure.
Option 3: To maintain unit vector length, facilitating accurate power calculations across different spreading factors.
Option 4: To reduce computational complexity in subsequent processing steps.
Explanation: Normalizing the channelization code set vectors (Cnorm) by dividing them by the square root of the spreading factor (sf) ensures that all vectors have a unit length, regardless of the spreading factor used. This normalization is crucial for accurate power calculations because it allows for a fair comparison and combination of signals processed with different spreading factors, thereby maintaining the integrity of the Code-Domain Power measurement.