Communication method and apparatus

By generating cyclic shift sequences based on m-sequences and ZC sequences, the problems of limited sequence capacity and multi-peak ambiguity functions in LTE/NR communication are solved, improving sequence capacity and reducing PDP detection complexity, making it suitable for communication between terminal devices and network devices.

WO2026130096A1PCT designated stage Publication Date: 2026-06-25HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2025-12-01
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

In Long Term Evolution (LTE)/New Radio (NR) communications, the Physical Random Access Channel (PRACH) sequences constructed from existing ZC sequences suffer from limited sequence capacity and multi-peak characteristics of ambiguity functions, leading to inaccurate determination of time delay and Doppler frequency shift, and increasing the complexity of power delay spectrum (PDP) detection.

Method used

By constructing a first sequence and using the cyclic shifting of the m-sequence and ZC-sequence, a sequence with a large capacity and low ambiguity region is generated. Combined with signal transmission delay and Doppler frequency shift design, the sequence capacity is improved and the PDP detection complexity is reduced.

Benefits of technology

It achieves an increase in sequence capacity, can resist Doppler frequency shift and time delay variations, reduces the complexity of PDP detection, and supports low-complexity related services, such as random access and sensing.

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Abstract

A communication method and apparatus, which relate to the field of communications. In the method, a first sequence is obtained by performing a cyclic shift on a second sequence, and the second sequence is obtained on the basis of a base sequence that is generated on the basis of an m sequence and an auxiliary sequence that has a cyclic shift characteristic and is generated on the basis of a ZC sequence. The first sequence constructed in this way has the characteristics of large capacity and low ambiguity zone, which improves the sequence capacity, can resist a Doppler shift and increases the area of a low ambiguity zone, and the first sequence also has a time-domain cyclic shift characteristic and can support PDP detection.
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