METHOD AND SYSTEM FOR SELECTING SPREADING SEQUENCES WITH VARIABLE SPREADING FACTORS

摘要

Embodiments herein achieve a method and system for selecting non-coherent spreading sequences with binary alphabets {0, 1} with variable spreading factors. The method generates circular shift equivalent sets of spreading sequences by circularly shifting base sequences with elements {1, 0} and having at least one variable spreading factor. The method determines whether each spreading sequence in the circular shift equivalent set meets pre-defined spreading sequence criteria. The spreading sequence criteria comprise balanced criteria, a non-repetition criteria, non-circular criteria, and conjugate criteria. Furthermore, the method selects the spreading sequence from expansions of at least one spreading sequence from the circular shift equivalent sets in response to determining that the spreading sequences in the circular shift equivalent sets meets the pre-defined spreading sequence criteria.

主权项

1. A method for selecting spreading sequences with variable spreading factors, the method comprising:
generating circular shift equivalent sets of spreading sequences by circularly shifting base sequences with elements {1, 0} and having at least one said variable spreading factor; determining whether each said spreading sequence in said circular shift equivalent set meets a pre-defined spreading sequence criteria, wherein said spreading sequence criteria comprises a balanced criteria, a non-repetition criteria, a non-circular criteria, and a conjugate criteria; and selecting said spreading sequence from expansions of at least one said spreading sequence from said circular shift equivalent sets in response to determining that said spreading sequences in said circular shift equivalent sets meets said pre-defined spreading sequence criteria.