Space–time trellis-coded ofdm systems in frequency-selective mobile fading channels

Name: Space–time trellis-coded ofdm systems in frequency-selective mobile fading channels
Author: Yeh, H.-G., Yıldız, Samet

İsim	Space–time trellis-coded ofdm systems in frequency-selective mobile fading channels
Yazar	Yeh, H.-G., Yıldız, Samet
Basım Tarihi:	2017-06
Basım Yeri	- IEEE
Konu	Conjugate cancelation (CC), Intercarrier interference (ICI), Space–time trellis code (STTC)
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1549-7747
Kayıt Numarası	76c6c05f-43af-4623-b31a-e2e4cd913dd5
Tarih	2017-06
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	Space-time trellis code (STTC) techniques provide both coding gain and diversity gain to orthogonal frequency-division multiplexing (OFDM) systems without reducing bandwidth efficiency. However, factors such as residual carrier frequency offset due to Doppler shift destroy the orthogonality among subcarriers, which results in intercarrier interference (ICI) in mobile fading channels and bit error rate (BER) degradation. This brief presents three STTC-based OFDM systems to improve BER in frequency-selective mobile fading channels. First, a new STTC-ST method is developed with OFDM to form a new STTC-ST-OFDM system. Second, a Walsh-Hadamard (WH) transform is employed as a precoder to form a new STTC-WH-ST-OFDM system with limited growing computation. Third, the STTC-WH-ST-OFDM system is integrated with an ST conjugate cancelation (CC) scheme to form an STTC-WH-STCC-OFDM transceiver with expanding bandwidth in order to combat ICI. Simulations indicate that the STTC-WH-STCC-OFDM system outperforms both STTC-WH-ST-OFDM and STTC-ST-OFDM systems, whereas the STTC-WH-ST-OFDM system outperforms the STTC-ST-OFDM system. All three schemes are simple and are backward compatible with existing OFDM systems. They can serve as baseband building blocks for multiuser OFDM systems, specifically in downlink networks.
DOI	10.1109/TCSII.2016.2598083
Cilt	64

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Space–time trellis-coded ofdm systems in frequency-selective mobile fading channels

Yazar Yeh, H.-G., Yıldız, Samet

Basım Tarihi 2017-06

Basım Yeri - IEEE

Konu Conjugate cancelation (CC), Intercarrier interference (ICI), Space–time trellis code (STTC)

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1549-7747

Kayıt Numarası 76c6c05f-43af-4623-b31a-e2e4cd913dd5

Tarih 2017-06

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin Space-time trellis code (STTC) techniques provide both coding gain and diversity gain to orthogonal frequency-division multiplexing (OFDM) systems without reducing bandwidth efficiency. However, factors such as residual carrier frequency offset due to Doppler shift destroy the orthogonality among subcarriers, which results in intercarrier interference (ICI) in mobile fading channels and bit error rate (BER) degradation. This brief presents three STTC-based OFDM systems to improve BER in frequency-selective mobile fading channels. First, a new STTC-ST method is developed with OFDM to form a new STTC-ST-OFDM system. Second, a Walsh-Hadamard (WH) transform is employed as a precoder to form a new STTC-WH-ST-OFDM system with limited growing computation. Third, the STTC-WH-ST-OFDM system is integrated with an ST conjugate cancelation (CC) scheme to form an STTC-WH-STCC-OFDM transceiver with expanding bandwidth in order to combat ICI. Simulations indicate that the STTC-WH-STCC-OFDM system outperforms both STTC-WH-ST-OFDM and STTC-ST-OFDM systems, whereas the STTC-WH-ST-OFDM system outperforms the STTC-ST-OFDM system. All three schemes are simple and are backward compatible with existing OFDM systems. They can serve as baseband building blocks for multiuser OFDM systems, specifically in downlink networks.

DOI 10.1109/TCSII.2016.2598083

Cilt 64