Generalized frequency division multiple access allocation scheme for LTE-A

Mohammed Melood A Abdased, Mahamod Ismail, Rosdiadee Nordin

Research output: Contribution to journalArticle

Abstract

Frequency Division Multiple Access (FDMA) is one of the important features of Long Term Evolution Advanced (LTE-A). For LTE-A downlink, Orthogonal FDMA (OFDMA) scheme is used to provide frequency orthogonality. Whereas, for uplink, Signal Carrier FDAM (SC-FDMA) is preferred since it provides improved PAPR performance over OFDMA. Interleaved FDMA (IFDMA) and Localized FDMA (LFDMA) are forms of SC-FDMA usually used in LTE-A. User subcarrier allocation method is the main distinction between IFDMA and LFDMA schemes. Users are allocated destributed frequency carriers in IFDMA while they are allocated localized carriers in LFDMA. Whereas IFDMA scheme provides better PAPR performance over LFDMA scheme, the latter has lower complexity requirements. In this paper a new user subcarrier allocation scheme is introduced. The proposed scheme provides a variable interleaved allocation of subcarriers in the bandwidth, hence it is named Generalized FDMA (GFDMA). This variable interleaved allocation scheme made the transition from IFDMA to LFDMA to be seamless. Theoritical derivation of the proposed scheme shows that both IFDMA and LFDMA are subclasses of GFDMA. Simulation results of the proposed GFDMA show that the signal PAPR calculated varies according to the interleave level selected. The simulation has been conducted for different QAM modulation schemes and bandwidths. In all the cases, GFDMA PAPR performance is in good match to the calculated IFDMA and LFDMA PAPR. Moreover, further enhancement in GFDMA PAPR is achieved as the number of users in a given bandwidth increased.

Original languageEnglish
Pages (from-to)496-506
Number of pages11
JournalJournal of Theoretical and Applied Information Technology
Volume70
Issue number3
Publication statusPublished - 2014

Fingerprint

Long Term Evolution (LTE)
Frequency division multiple access
Multiple Access
Peak-to-average Power Ratio (PAPR)
Division
Term
Subcarrier Allocation
Bandwidth
Orthogonal Frequency Division multiple Access (OFDMA)
Uplink
Orthogonality
Low Complexity
Simulation
Modulation
Enhancement
Vary
Requirements

Keywords

  • GFDMA
  • IFDMA
  • LFDMA
  • LTE-A
  • SC-FDMA

ASJC Scopus subject areas

  • Computer Science(all)
  • Theoretical Computer Science

Cite this

Generalized frequency division multiple access allocation scheme for LTE-A. / Abdased, Mohammed Melood A; Ismail, Mahamod; Nordin, Rosdiadee.

In: Journal of Theoretical and Applied Information Technology, Vol. 70, No. 3, 2014, p. 496-506.

Research output: Contribution to journalArticle

@article{8d979bf3bc97437bb0185a12a0251f0a,
title = "Generalized frequency division multiple access allocation scheme for LTE-A",
abstract = "Frequency Division Multiple Access (FDMA) is one of the important features of Long Term Evolution Advanced (LTE-A). For LTE-A downlink, Orthogonal FDMA (OFDMA) scheme is used to provide frequency orthogonality. Whereas, for uplink, Signal Carrier FDAM (SC-FDMA) is preferred since it provides improved PAPR performance over OFDMA. Interleaved FDMA (IFDMA) and Localized FDMA (LFDMA) are forms of SC-FDMA usually used in LTE-A. User subcarrier allocation method is the main distinction between IFDMA and LFDMA schemes. Users are allocated destributed frequency carriers in IFDMA while they are allocated localized carriers in LFDMA. Whereas IFDMA scheme provides better PAPR performance over LFDMA scheme, the latter has lower complexity requirements. In this paper a new user subcarrier allocation scheme is introduced. The proposed scheme provides a variable interleaved allocation of subcarriers in the bandwidth, hence it is named Generalized FDMA (GFDMA). This variable interleaved allocation scheme made the transition from IFDMA to LFDMA to be seamless. Theoritical derivation of the proposed scheme shows that both IFDMA and LFDMA are subclasses of GFDMA. Simulation results of the proposed GFDMA show that the signal PAPR calculated varies according to the interleave level selected. The simulation has been conducted for different QAM modulation schemes and bandwidths. In all the cases, GFDMA PAPR performance is in good match to the calculated IFDMA and LFDMA PAPR. Moreover, further enhancement in GFDMA PAPR is achieved as the number of users in a given bandwidth increased.",
keywords = "GFDMA, IFDMA, LFDMA, LTE-A, SC-FDMA",
author = "Abdased, {Mohammed Melood A} and Mahamod Ismail and Rosdiadee Nordin",
year = "2014",
language = "English",
volume = "70",
pages = "496--506",
journal = "Journal of Theoretical and Applied Information Technology",
issn = "1992-8645",
publisher = "Asian Research Publishing Network (ARPN)",
number = "3",

}

TY - JOUR

T1 - Generalized frequency division multiple access allocation scheme for LTE-A

AU - Abdased, Mohammed Melood A

AU - Ismail, Mahamod

AU - Nordin, Rosdiadee

PY - 2014

Y1 - 2014

N2 - Frequency Division Multiple Access (FDMA) is one of the important features of Long Term Evolution Advanced (LTE-A). For LTE-A downlink, Orthogonal FDMA (OFDMA) scheme is used to provide frequency orthogonality. Whereas, for uplink, Signal Carrier FDAM (SC-FDMA) is preferred since it provides improved PAPR performance over OFDMA. Interleaved FDMA (IFDMA) and Localized FDMA (LFDMA) are forms of SC-FDMA usually used in LTE-A. User subcarrier allocation method is the main distinction between IFDMA and LFDMA schemes. Users are allocated destributed frequency carriers in IFDMA while they are allocated localized carriers in LFDMA. Whereas IFDMA scheme provides better PAPR performance over LFDMA scheme, the latter has lower complexity requirements. In this paper a new user subcarrier allocation scheme is introduced. The proposed scheme provides a variable interleaved allocation of subcarriers in the bandwidth, hence it is named Generalized FDMA (GFDMA). This variable interleaved allocation scheme made the transition from IFDMA to LFDMA to be seamless. Theoritical derivation of the proposed scheme shows that both IFDMA and LFDMA are subclasses of GFDMA. Simulation results of the proposed GFDMA show that the signal PAPR calculated varies according to the interleave level selected. The simulation has been conducted for different QAM modulation schemes and bandwidths. In all the cases, GFDMA PAPR performance is in good match to the calculated IFDMA and LFDMA PAPR. Moreover, further enhancement in GFDMA PAPR is achieved as the number of users in a given bandwidth increased.

AB - Frequency Division Multiple Access (FDMA) is one of the important features of Long Term Evolution Advanced (LTE-A). For LTE-A downlink, Orthogonal FDMA (OFDMA) scheme is used to provide frequency orthogonality. Whereas, for uplink, Signal Carrier FDAM (SC-FDMA) is preferred since it provides improved PAPR performance over OFDMA. Interleaved FDMA (IFDMA) and Localized FDMA (LFDMA) are forms of SC-FDMA usually used in LTE-A. User subcarrier allocation method is the main distinction between IFDMA and LFDMA schemes. Users are allocated destributed frequency carriers in IFDMA while they are allocated localized carriers in LFDMA. Whereas IFDMA scheme provides better PAPR performance over LFDMA scheme, the latter has lower complexity requirements. In this paper a new user subcarrier allocation scheme is introduced. The proposed scheme provides a variable interleaved allocation of subcarriers in the bandwidth, hence it is named Generalized FDMA (GFDMA). This variable interleaved allocation scheme made the transition from IFDMA to LFDMA to be seamless. Theoritical derivation of the proposed scheme shows that both IFDMA and LFDMA are subclasses of GFDMA. Simulation results of the proposed GFDMA show that the signal PAPR calculated varies according to the interleave level selected. The simulation has been conducted for different QAM modulation schemes and bandwidths. In all the cases, GFDMA PAPR performance is in good match to the calculated IFDMA and LFDMA PAPR. Moreover, further enhancement in GFDMA PAPR is achieved as the number of users in a given bandwidth increased.

KW - GFDMA

KW - IFDMA

KW - LFDMA

KW - LTE-A

KW - SC-FDMA

UR - http://www.scopus.com/inward/record.url?scp=84920131475&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920131475&partnerID=8YFLogxK

M3 - Article

VL - 70

SP - 496

EP - 506

JO - Journal of Theoretical and Applied Information Technology

JF - Journal of Theoretical and Applied Information Technology

SN - 1992-8645

IS - 3

ER -