Performance Analysis of Low-Complexity Uniform Power Loading with Reduced-Overhead OFDM Systems over Rayleigh Fading Channels

Ebrahim Bedeer Mohamed, Jahangir Hossain

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In this paper, we analyze the performance of two low-complexity uniform power loading with reduced-overhead orthogonal frequency division multiplexing (OFDM) schemes over Rayleigh fading channels. In the first feedback scheme, the receiver feeds back to the transmitter the channel gains and the indices of the best M subchannels; while for the second feedback scheme, the receiver feeds back only the indices of the best M subchannels. In both schemes, the available power budget is equally distributed over the best M subchannels. We derive closed-form expressions for the capacity and the outage capacity of the first and second schemes, respectively. Numerical results show that there is an optimal number of the best subchannels, M, that maximizes the achievable capacity and it depends on the system parameters.
LanguageEnglish
Journal2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall)
DOIs
Publication statusPublished - 28 Jan 2016
Event2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall) - Boston, United States
Duration: 6 Sep 20159 Sep 2015

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Rayleigh fading
Fading channels
Orthogonal frequency division multiplexing
Feedback
Antenna feeders
Outages
Transmitters

Keywords

  • OFDM
  • Order Statistics
  • Rayleigh fading
  • reduced feedback
  • uniform power loading.

Cite this

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title = "Performance Analysis of Low-Complexity Uniform Power Loading with Reduced-Overhead OFDM Systems over Rayleigh Fading Channels",
abstract = "In this paper, we analyze the performance of two low-complexity uniform power loading with reduced-overhead orthogonal frequency division multiplexing (OFDM) schemes over Rayleigh fading channels. In the first feedback scheme, the receiver feeds back to the transmitter the channel gains and the indices of the best M subchannels; while for the second feedback scheme, the receiver feeds back only the indices of the best M subchannels. In both schemes, the available power budget is equally distributed over the best M subchannels. We derive closed-form expressions for the capacity and the outage capacity of the first and second schemes, respectively. Numerical results show that there is an optimal number of the best subchannels, M, that maximizes the achievable capacity and it depends on the system parameters.",
keywords = "OFDM, Order Statistics, Rayleigh fading, reduced feedback, uniform power loading.",
author = "Mohamed, {Ebrahim Bedeer} and Jahangir Hossain",
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Performance Analysis of Low-Complexity Uniform Power Loading with Reduced-Overhead OFDM Systems over Rayleigh Fading Channels. / Mohamed, Ebrahim Bedeer; Hossain, Jahangir.

28.01.2016.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Performance Analysis of Low-Complexity Uniform Power Loading with Reduced-Overhead OFDM Systems over Rayleigh Fading Channels

AU - Mohamed, Ebrahim Bedeer

AU - Hossain, Jahangir

PY - 2016/1/28

Y1 - 2016/1/28

N2 - In this paper, we analyze the performance of two low-complexity uniform power loading with reduced-overhead orthogonal frequency division multiplexing (OFDM) schemes over Rayleigh fading channels. In the first feedback scheme, the receiver feeds back to the transmitter the channel gains and the indices of the best M subchannels; while for the second feedback scheme, the receiver feeds back only the indices of the best M subchannels. In both schemes, the available power budget is equally distributed over the best M subchannels. We derive closed-form expressions for the capacity and the outage capacity of the first and second schemes, respectively. Numerical results show that there is an optimal number of the best subchannels, M, that maximizes the achievable capacity and it depends on the system parameters.

AB - In this paper, we analyze the performance of two low-complexity uniform power loading with reduced-overhead orthogonal frequency division multiplexing (OFDM) schemes over Rayleigh fading channels. In the first feedback scheme, the receiver feeds back to the transmitter the channel gains and the indices of the best M subchannels; while for the second feedback scheme, the receiver feeds back only the indices of the best M subchannels. In both schemes, the available power budget is equally distributed over the best M subchannels. We derive closed-form expressions for the capacity and the outage capacity of the first and second schemes, respectively. Numerical results show that there is an optimal number of the best subchannels, M, that maximizes the achievable capacity and it depends on the system parameters.

KW - OFDM

KW - Order Statistics

KW - Rayleigh fading

KW - reduced feedback

KW - uniform power loading.

U2 - 10.1109/VTCFall.2015.7391070

DO - 10.1109/VTCFall.2015.7391070

M3 - Conference article

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