Question: In 5G NR (New Radio) as per 3GPP specifications, what is the primary mechanism used to generate generic pseudo-random sequences for physical channels and modulation?
Option 1: Length-31 Gold sequence
Option 2: Recursive Cellular Automaton
Option 3: Linear Feedback Shift Register (LFSR) with variable tap settings
Option 4: Context-dependent Hadamard Transform
Explanation: The correct answer is Option 1 because, according to the 3GPP specifications for 5G NR (as extracted from TS 38.211), generic pseudo-random sequences are indeed defined by a length-31 Gold sequence. This method is utilized for generating pseudo-random sequences necessary in various aspects of physical channel processing and modulation within the 5G New Radio framework. The use of a Gold sequence ensures a high degree of randomness and orthogonality, which are crucial for minimizing interference and optimizing spectrum usage in wireless communications.