5G low earth orbit satellite random access signal design method based on ZC sequence

Abstract

The invention discloses a 5G low earth orbit satellite random access signal design method based on a ZC sequence, and the method comprises the steps: determining the maximum round-trip transmission delay inequality between ground terminal equipment and a low earth orbit satellite, determining the duration time TCP of a cyclic prefix (CP) and the duration time TGT of a guard time (GT), determining the duration time TSeq of a random access preamble sequence Sequence and the length N of the preamble sequence, and determining the maximum round-trip transmission delay inequality between the ground terminal equipment and the low earth orbit satellite. And setting a first sequence root value s, so that the first sequence root value s and the first sequence short sequence length NZC are co-prime, and obtaining a set Rroot formed by second sequence root values r used by different random access preamble sequences. The method can cope with the round-trip delay inequality in the propagation process and meet the requirement of the beam coverage range, meanwhile, the method has good self-correlation and cross-correlation performance, and more users can be allowed to carry out random access at the same time.

Description

technical field [0001] The invention relates to the technical field of wireless communication based on satellite technology, in particular to a method for designing a random access signal of a 5G low-orbit satellite based on a ZC sequence. Background technique [0002] The emergence and development of terrestrial cellular communication technology has greatly improved the way of human life and social development. At present, the fifth generation (5G) cellular communication technology not only further improves the communication performance between people, but also provides the communication connection between things and meets the needs of more diverse application scenarios. . However, even the current 5G technology is limited by factors such as the terrain environment, infrastructure costs, deployment conditions, and coverage, and it is still unable to operate in sparsely populated and remote areas, areas prone to geological disasters, and areas with complex environments such...

AI Technical Summary

Problems solved by technology

The random access preamble obtained by these schemes does not have good autocorrelation and cross-correlation performance

And if cyclic shift is used to distinguish different users, it will be limited by the large round-trip delay difference of the satellite system, which will seriously waste resources and cannot accommodate more users for random access at the same time

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