A Bipartite Graph Approach for FDD V2V Underlay Massive MIMO Transmission

Li You, Meng Xiao, Kezhi Wang, Wenjin Wang, Xiqi Gao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
10 Downloads (Pure)

Abstract

Utilizing the inherent sparsity of massive multiple-input multiple-output (MIMO) channels in the beam domain, we propose a bipartite graph approach for frequency-division duplexing (FDD) vehicle-to-vehicle (V2V) underlay massive MIMO transmission. First, the physically motivated constraints are introduced to schedule the users with channel dimension no larger than the pilot dimension and beam directions with strong channel power as well as weak interference. We then develop an optimization problem which is formulated as a mixed-integer linear program (MILP) to maximize the rank of the effective channel matrix subject to the introduced constraints. We further provide a channel estimation and precoding scheme for the base station and each V2V transmitter over the equivalent reduced-dimensional channels based on the solution of MILP. Numerical results show the superiority of the proposed bipartite graph approach in terms of pilot overhead and spectral efficiency over the conventional baseline.

Original languageEnglish
Article number9416890
Pages (from-to)5149-5154
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume70
Issue number5
Early online date27 Apr 2021
DOIs
Publication statusPublished - May 2021

Fingerprint

Dive into the research topics of 'A Bipartite Graph Approach for FDD V2V Underlay Massive MIMO Transmission'. Together they form a unique fingerprint.

Cite this