Scrambling sequence generation in a communication system

摘要

Techniques for performing scrambling and descrambling in a communication system are described. In an aspect, different scrambling sequences for different channels and signals may be generated based on different cyclic shifts of a base scrambling sequence, which may be a maximal-length sequence. A scrambling sequence for a given channel may be generated by (i) determining a sequence selector value based on a channel type value and at least one parameter value for the channel and (ii) cyclically shifting the base scrambling sequence based on the sequence selector value. In another aspect, a reference signal sent on variable system bandwidth may be generated with two scrambling sequences, which may be different cyclic shifts of a base scrambling sequence. Scrambling/descrambling for positive and negative frequencies for the reference signal may be performed with the first and second scrambling sequences, respectively.

主权项

1. A method for communication, performed by at least one processor, comprising:
mapping a start of a first scrambling sequence to a center of a system bandwidth and traversing outwardly in a positive frequency direction; mapping a start of a second scrambling sequence to the center of the system bandwidth and traversing outwardly in a negative frequency direction; performing scrambling or descrambling for positive frequencies for a reference signal with the first scrambling sequence; and performing scrambling or descrambling for negative frequencies for the reference signal with the second scrambling sequence.