Limited Feedback MU-MIMO in LTE-A System: Concepts, Performance, and Future Works

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In wireless communications, interference is known as a major restricting factor in achieving system capacity. Therefore, in the Long-Term evolution (LTE) system, a transmitter and a receiver collaborate together to tackle the interference. To do so, in the frequency division duplex system, information of downlink channel must be shared among the transceivers via a limited feedback technique. In this regard, this paper discusses the downlink transmission of multi-user multiple-input multiple-output with limited feedback in the LTE-Advanced system. Extensive studies are conducted on all steps of downlink transmissions and receptions which include techniques such as receive antenna combining, channel state information (CSI) acquisition, CSI quantization, precoding, and user scheduling. By utilizing a LTE-A standard compliant simulator, the link-level performance of the system is evaluated under different receive antenna combiners and quantization codebooks. Moreover, the main system constraints such as channel delay and imperfect CSI are applied to the system which results show that the system performance severely degrades under imperfections, especially when the number of transmit antennas increases. The results mainly reveal that to achieve the capacity of LTE-A, with the presence of interference, delay, and limited feedback, more sophisticated methods are required. Hence, this study precisely addresses the future works on CSI quantization, precoding, and user scheduling.

Original languageEnglish
Pages (from-to)935-957
Number of pages23
JournalWireless Personal Communications
Volume84
Issue number2
DOIs
Publication statusPublished - 14 Sep 2015

Fingerprint

Long Term Evolution (LTE)
Channel state information
MIMO systems
Quantization (signal)
Feedback
Antennas
Scheduling
Transceivers
Transmitters
Information systems
Simulators
Defects
Communication

Keywords

  • Channel state information
  • Limited feedback
  • LTE-A
  • Multi-user MIMO
  • Quantization codebook
  • Receive antenna combiner
  • User scheduling
  • ZF precoding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

Cite this

Limited Feedback MU-MIMO in LTE-A System : Concepts, Performance, and Future Works. / Behjati, Mehran; Ismail, Mahamod; Nordin, Rosdiadee.

In: Wireless Personal Communications, Vol. 84, No. 2, 14.09.2015, p. 935-957.

Research output: Contribution to journalArticle

@article{c32f8f2e127e40818fdc2dc35a731357,
title = "Limited Feedback MU-MIMO in LTE-A System: Concepts, Performance, and Future Works",
abstract = "In wireless communications, interference is known as a major restricting factor in achieving system capacity. Therefore, in the Long-Term evolution (LTE) system, a transmitter and a receiver collaborate together to tackle the interference. To do so, in the frequency division duplex system, information of downlink channel must be shared among the transceivers via a limited feedback technique. In this regard, this paper discusses the downlink transmission of multi-user multiple-input multiple-output with limited feedback in the LTE-Advanced system. Extensive studies are conducted on all steps of downlink transmissions and receptions which include techniques such as receive antenna combining, channel state information (CSI) acquisition, CSI quantization, precoding, and user scheduling. By utilizing a LTE-A standard compliant simulator, the link-level performance of the system is evaluated under different receive antenna combiners and quantization codebooks. Moreover, the main system constraints such as channel delay and imperfect CSI are applied to the system which results show that the system performance severely degrades under imperfections, especially when the number of transmit antennas increases. The results mainly reveal that to achieve the capacity of LTE-A, with the presence of interference, delay, and limited feedback, more sophisticated methods are required. Hence, this study precisely addresses the future works on CSI quantization, precoding, and user scheduling.",
keywords = "Channel state information, Limited feedback, LTE-A, Multi-user MIMO, Quantization codebook, Receive antenna combiner, User scheduling, ZF precoding",
author = "Mehran Behjati and Mahamod Ismail and Rosdiadee Nordin",
year = "2015",
month = "9",
day = "14",
doi = "10.1007/s11277-015-2669-7",
language = "English",
volume = "84",
pages = "935--957",
journal = "Wireless Personal Communications",
issn = "0929-6212",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - Limited Feedback MU-MIMO in LTE-A System

T2 - Concepts, Performance, and Future Works

AU - Behjati, Mehran

AU - Ismail, Mahamod

AU - Nordin, Rosdiadee

PY - 2015/9/14

Y1 - 2015/9/14

N2 - In wireless communications, interference is known as a major restricting factor in achieving system capacity. Therefore, in the Long-Term evolution (LTE) system, a transmitter and a receiver collaborate together to tackle the interference. To do so, in the frequency division duplex system, information of downlink channel must be shared among the transceivers via a limited feedback technique. In this regard, this paper discusses the downlink transmission of multi-user multiple-input multiple-output with limited feedback in the LTE-Advanced system. Extensive studies are conducted on all steps of downlink transmissions and receptions which include techniques such as receive antenna combining, channel state information (CSI) acquisition, CSI quantization, precoding, and user scheduling. By utilizing a LTE-A standard compliant simulator, the link-level performance of the system is evaluated under different receive antenna combiners and quantization codebooks. Moreover, the main system constraints such as channel delay and imperfect CSI are applied to the system which results show that the system performance severely degrades under imperfections, especially when the number of transmit antennas increases. The results mainly reveal that to achieve the capacity of LTE-A, with the presence of interference, delay, and limited feedback, more sophisticated methods are required. Hence, this study precisely addresses the future works on CSI quantization, precoding, and user scheduling.

AB - In wireless communications, interference is known as a major restricting factor in achieving system capacity. Therefore, in the Long-Term evolution (LTE) system, a transmitter and a receiver collaborate together to tackle the interference. To do so, in the frequency division duplex system, information of downlink channel must be shared among the transceivers via a limited feedback technique. In this regard, this paper discusses the downlink transmission of multi-user multiple-input multiple-output with limited feedback in the LTE-Advanced system. Extensive studies are conducted on all steps of downlink transmissions and receptions which include techniques such as receive antenna combining, channel state information (CSI) acquisition, CSI quantization, precoding, and user scheduling. By utilizing a LTE-A standard compliant simulator, the link-level performance of the system is evaluated under different receive antenna combiners and quantization codebooks. Moreover, the main system constraints such as channel delay and imperfect CSI are applied to the system which results show that the system performance severely degrades under imperfections, especially when the number of transmit antennas increases. The results mainly reveal that to achieve the capacity of LTE-A, with the presence of interference, delay, and limited feedback, more sophisticated methods are required. Hence, this study precisely addresses the future works on CSI quantization, precoding, and user scheduling.

KW - Channel state information

KW - Limited feedback

KW - LTE-A

KW - Multi-user MIMO

KW - Quantization codebook

KW - Receive antenna combiner

KW - User scheduling

KW - ZF precoding

UR - http://www.scopus.com/inward/record.url?scp=84938990237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938990237&partnerID=8YFLogxK

U2 - 10.1007/s11277-015-2669-7

DO - 10.1007/s11277-015-2669-7

M3 - Article

AN - SCOPUS:84938990237

VL - 84

SP - 935

EP - 957

JO - Wireless Personal Communications

JF - Wireless Personal Communications

SN - 0929-6212

IS - 2

ER -