面向mMIMO系统的模式分割随机接入方案

doi:10.11959/j.issn.1000-0801.2022277

Abstract

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.

Key words: mMTC, MIMO, random access, pattern division random access, pattern-domain

CLC Number:

TN92

Xiaoming DAI, Lizhuo PANG, Zheng CHANG, Xinyue ZHANG, Yiran XING, Xiyuan WANG. Pattern division random access (PDRA) scheme for mMIMO systems[J]. Telecommunications Science, 2022, 38(10): 57-66.

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参数	数值
小区半径/m	500
UE数/个	10 000
ZC序列长度	839
信道模型	空间相关/不相关瑞利衰落
路径损耗指数	2.5（视距）/3.8（非视距）
对数正态分布阴影衰落标准差	4 dB（视距）/10 dB（非视距）

Pattern division random access (PDRA) scheme for mMIMO systems

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