Angle-domain Frequency Synchronization for Massive MIMO Uplink with Adaptive MUI Suppression

被引：0

作者：

Ge, Yinghao ^{[1
]}

Zhang, Weile ^{[1
]}

Gao, Feifei ^{[2
]}

Mu, Pengcheng ^{[1
]}

Zhao, Guangzhe ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China

[2] Tsinghua Univ, Dept Automat, Beijing 100084, Peoples R China

[3] Beijing Univ Civil Engn & Architecture, Coll Elect & Informat Engn, Beijing, Peoples R China

来源：

2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM) | 2018年

基金：

中国国家自然科学基金;

关键词：

WIRELESS; CFO;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we design a novel angle-domain adaptive filtering (ADAF)-based frequency synchronization method for massive multiple-input multiple-output (MIMO) multiuser uplink, which is suitable for users with either separate or overlapped angle-of-arrival (AoA) regions. We first introduce the angle-constraining matrix (ACM), which consists of a set of selected match-filter (MF) beamformers pointing to the AoAs of the interested user. Then, the adaptive beamformer can be acquired by appropriately designing the ADAF vector. Such beamformer can achieve a two-stage adaptive multiuser interference (MUI) suppression, i.e., inherently suppressing the MUI from distant users by ACM in the first stage and substantially mitigating the MUI from adjacent overlapping users by ADAF vector in the second stage. For both separate and mutually overlapping users, the carrier frequency offset (CFO) estimation and subsequent data detection can be performed individually for each user, which reduces the computational complexity. Moreover, ADAF is rather insensitive to imperfect AoA knowledge, making itself promising for multiuser uplink transmission. Numerical results are provided to show the effectiveness of the proposed method, as well as its superiority over existing competitors.

引用

页数：6