SINR analysis of FFH/OFDM over frequency selective Rayleigh fading channel

Fast frequency hopping/orthogonal frequency division multiplexing (FFH/OFDM) has been previously proposed to achieve frequency diversity over frequency selective channels. However, the performances of the FFH/OFDM scheme have been usually calculated using simulations over empirical channel models in earlier works. The main aim of this paper is to theoretically expose the diversity of the FFH/OFDM signal over statistical models, specifically Rayleigh distributed, for frequency selective fading channels. In order to achieve this aim, we first derive the decision variables and the signal-to-interference noise ratios of the FFH/OFDM signal at the output of minimum mean square error and zero forcing receivers. For various levels of quadrature amplitude modulation used in FFH/OFDM, the performances are calculated and validated via simulations. The results show that FFH/OFDM in case of zero forcing equalization does not provide any diversity gain even over a frequency selective channel. However, in case of minimum mean square error equalization, it brings significant diversity gain at high signal-to-noise ratio (SNR) values with the rise of number of sub-carriers. Moreover, the FFH/OFDM with four quadrature amplitude modulation scheme provides better performance than that of the conventional OFDM even at low SNR values, as well as a significant diversity gain at high SNR values. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

Dergi Adı Wireless Communications and Mobile Computing
Dergi Cilt Bilgisi 16
Dergi Sayısı 18
Sayfalar 3244 - 3255
Yayın Yılı 2016
Eser Adı
[dc.title]
SINR analysis of FFH/OFDM over frequency selective Rayleigh fading channel
Yazar
[dc.contributor.author]
Oturak A.
Yazar
[dc.contributor.author]
Öztürk E.
Yayın Yılı
[dc.date.issued]
2016
Yayıncı
[dc.publisher]
John Wiley and Sons Ltd
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Fast frequency hopping/orthogonal frequency division multiplexing (FFH/OFDM) has been previously proposed to achieve frequency diversity over frequency selective channels. However, the performances of the FFH/OFDM scheme have been usually calculated using simulations over empirical channel models in earlier works. The main aim of this paper is to theoretically expose the diversity of the FFH/OFDM signal over statistical models, specifically Rayleigh distributed, for frequency selective fading channels. In order to achieve this aim, we first derive the decision variables and the signal-to-interference noise ratios of the FFH/OFDM signal at the output of minimum mean square error and zero forcing receivers. For various levels of quadrature amplitude modulation used in FFH/OFDM, the performances are calculated and validated via simulations. The results show that FFH/OFDM in case of zero forcing equalization does not provide any diversity gain even over a frequency selective channel. However, in case of minimum mean square error equalization, it brings significant diversity gain at high signal-to-noise ratio (SNR) values with the rise of number of sub-carriers. Moreover, the FFH/OFDM with four quadrature amplitude modulation scheme provides better performance than that of the conventional OFDM even at low SNR values, as well as a significant diversity gain at high SNR values. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
FFH/OFDM
Konu Başlıkları
[dc.subject]
MMSE
Konu Başlıkları
[dc.subject]
Rayleigh fading
Konu Başlıkları
[dc.subject]
SC-FDE
Konu Başlıkları
[dc.subject]
ZF
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
1530-8669
İlk Sayfa Sayısı
[dc.identifier.startpage]
3244
Son Sayfa Sayısı
[dc.identifier.endpage]
3255
Dergi Adı
[dc.relation.journal]
Wireless Communications and Mobile Computing
Dergi Sayısı
[dc.identifier.issue]
18
Dergi Cilt Bilgisi
[dc.identifier.volume]
16
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1002/wcm.2756
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/7545
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
14
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
06 Şubat 2024 23:22
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frequency FFH/OFDM diversity selective values significant signal minimum square forcing quadrature amplitude modulation equalization Copyright scheme performances However channels achieve simulations calculated models channel signal-to-noise better provide provides Moreover sub-carriers number conventional brings performance results
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