Pattern division random access (PDRA) scheme for mMIMO systems

Xiaoming DAI; Lizhuo PANG; Zheng CHANG; Xinyue ZHANG; Yiran XING; Xiyuan WANG

doi:10.11959/j.issn.1000-0801.2022277

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Pattern division random access (PDRA) scheme for mMIMO systems

Topic: 6G Wireless Transmission Technology | 更新时间：2024-06-05

- Pattern division random access (PDRA) scheme for mMIMO systems
- Telecommunications Science Vol. 38, Issue 10, Pages: 57-66(2022)
- 作者机构：
  
  1. 北京科技大学计算机与通信工程学院，北京 100083
  2. 北京信息科技大学信息与通信工程学院，北京 100083
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2022277
  CLC： TN92
- Published Online：2022-10，
  
  Published：20 October 2022
- 稿件说明：
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Xiaoming DAI, Lizhuo PANG, Zheng CHANG, et al. Pattern division random access (PDRA) scheme for mMIMO systems[J]. Telecommunications science, 2022, 38(10): 57-66.
DOI：

Xiaoming DAI, Lizhuo PANG, Zheng CHANG, et al. Pattern division random access (PDRA) scheme for mMIMO systems[J]. Telecommunications science, 2022, 38(10): 57-66. DOI： 10.11959/j.issn.1000-0801.2022277.

摘要

为提升海量机器类通信（massive machine-type communication，mMTC）设备的随机接入（random access， RA）性能，提出一种面向大规模多输入多输出（massive multiple-input multiple-output，mMIMO）系统的模式分割随机接入（pattern division random access，PDRA）方案。该方案将导频竞争空间扩展到模式域，通过叠加同一ZC（Zadoff-Chu）根序列的L个不同循环移位序列，设计基于“图样叠加”的模式域导频，在不增加物理资源的前提下扩大导频集合。仿真结果表明，在不影响信道估计和数据检测性能的前提下，与传统 RA方案相比，PDRA方案能够显著降低导频碰撞概率，提高接入成功率。

Abstract

To enhance the massive machine-type communications (mMTC) random access (RA) performance

a pattern division random access (PDRA) scheme was proposed for massive multiple-input multiple-output (mMIMO) systems.In this scheme

the pilot contention space was expanded to the pattern-domain.To enlarge the size of contention space without resorting to increasing the physical resources

the pattern-domain pilot was constructed based on the superposition of L cyclically-shifted Zadoff-Chu (ZC) sequences.Simulation results illustrate that the PDRA scheme can reduce pilot collision probability significantly

and improve the access success probability compared with the conventional RA scheme

without compromising excessively on channel estimation and data detection performance.

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Keywords

references

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