On the Performance of Distributed Antenna Array Systems With Quasi-Orthogonal Pilots

Chowdhury, Anubhab and Sasmal, Pradip and Murthy, Chandra R. and et al, . (2022) On the Performance of Distributed Antenna Array Systems With Quasi-Orthogonal Pilots. IEEE Transactions on Vehicular Technology, 71 (3). pp. 3326-3331. ISSN 0018-9545

Text
IEEE_Transactions_on_Vehicular_Technology.pdf - Published Version
Restricted to Registered users only
Download (1MB) | Request a copy

Abstract

In this paper, we address the problem of channel estimation in a single cell massive multiple-input multiple-output (mMIMO) system with distributed antenna arrays (DAA) under the availability of limited pilots. Specifically, we propose to use pilots that are not only orthogonal within a cluster but also minimally correlated across clusters. We show that pilot sets that form mutually unbiased orthonormal bases (MUOB) minimize both inter- and intra-cluster pilot contamination. This also allows us to optimally choose the number of pilots needed to serve a given number of user equipments (UEs) within a DAA-mMIMO system. Following this, we develop an access point (AP) centered UE clustering algorithm to optimally cluster UEs for MUOB pilot allocation. Our experiments reveal that in a DAA-mMIMO system, MUOB not only offers better fairness compared to the traditional orthogonal pilot reuse scheme in terms of channel estimation error and per-UE throughput, but also delivers a higher sum system throughput. © 1967-2012 IEEE.

[error in script]

IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Additional Information:

This work was financially supported in part by the research Grants from Intel India and in part by the Young Faculty Research Fellowship from the Ministry of Electronics and Information Technology, Govt. of India.

Uncontrolled Keywords:

Correlation; Distributed antenna arrays; Index; Massive MIMO; Multiple-Input Multiple- Output systems; Orthonormal basis; Performance; Pilot contaminations; Resource management; User equipments

Subjects:

Electrical Engineering
Electrical Engineering > Wireless Communication

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

20 Jul 2022 11:37

Last Modified:

20 Jul 2022 11:37

URI:

http://raiithold.iith.ac.in/id/eprint/9606