Next Article in Journal
Design of Electroporation Process in Irregularly Shaped Multicellular Systems
Next Article in Special Issue
Efficient Pilot Decontamination Schemes in 5G Massive MIMO Systems
Previous Article in Journal
Low-Cost Portable Reader for Frequency Domain Chipless Tags: Architecture and Experimental Results on Depolarizing Tags
Previous Article in Special Issue
Spectral and Energy Efficiency of Distributed Massive MIMO with Low-Resolution ADC
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle

Channel Sounding for Multi-User Massive MIMO in Distributed Antenna System Environment

and *,†
School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 06974, Korea
*
Author to whom correspondence should be addressed.
Current address: 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
Electronics 2019, 8(1), 36; https://doi.org/10.3390/electronics8010036
Received: 20 November 2018 / Revised: 14 December 2018 / Accepted: 21 December 2018 / Published: 1 January 2019
(This article belongs to the Special Issue Massive MIMO Systems)
  |  
PDF [383 KB, uploaded 1 January 2019]
  |  

Abstract

We propose a generation scheme for a sounding reference signal (SRS) suitable for supporting a large number of users in massive multi-input multi-output (MIMO) system with a distributed antenna system (DAS) environment. The proposed SRS can alleviate the pilot contamination problem which occurs inherently in the multi-user system due to the limited number of orthogonal sequences. The proposed SRS sequence is generated by applying a well-chosen phase rotation to the conventional LTE/LTE-A SRS sequences without requiring an increased amount of resource usage. We also propose using the correlation-aided channel estimation algorithm as a supplemental scheme to obtain more reliable and refined channel estimation. It is shown that the proposed SRS sequence and the supplemental channel estimation scheme improve significantly the channel estimation performance in multi-user massive MIMO systems. View Full-Text
Keywords: massive multi-input multi-output (MIMO); distributed antenna systems (DAS); sounding reference signal (SRS); channel estimation massive multi-input multi-output (MIMO); distributed antenna systems (DAS); sounding reference signal (SRS); channel estimation
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Yu, S.; Lee, J.W. Channel Sounding for Multi-User Massive MIMO in Distributed Antenna System Environment. Electronics 2019, 8, 36.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Electronics EISSN 2079-9292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top