Detaylı Arama
İptal
Bulunan: 7 Adet 0.002 sn
- Eklemek veya çıkarmak istediğiniz kriterleriniz için 'Dahil' / 'Hariç' seçeneğini kullanabilirsiniz. Sorgu satırları birbirine 'VE' bağlacı ile bağlıdır.
- İptal tuşuna basarak normal aramaya dönebilirsiniz.
Filtreler
Filtreler
Bulunan: 7 Adet 0.002 sn
İsmi Geçen : Web Of Since ismi ge ... ✕İlgili Araştırmacılar : Asuman SAVAŞÇIHABEŞ ... ✕
Koleksiyon [3]
İlgili Araştırmacılar [2]
Tam Metin [2]
Tür [2]
Yazar [2]
Alt Tür [1]
Alt Tür 1 [1]
Konu Başlıkları [20]
Açık Erişim Tarihi [1]
Tarih [5]
Dizin Platformu [2]
İsmi Geçen [3]
WOS Kategorileri [3]
Dr. Öğr. Üyesi Asuman SAVAŞÇIHABEŞElektrik-Elektronik Mühendisliği
Erişime Açık

Capacity improvement of ieee802.11n mimo-ofdm wlans using joint transmit/receive antenna selection over spatially multiplexing correlated channels

Asuman SAVAŞÇIHABEŞ

In this paper, we study and compare performance of joint transmit/receive antenna selection in MIMO-OFDM WLANs using dual polarized stacked circular microstrip antennas (SMP-SCP-ULA).At receiver side we use a flexible two-step selection algorithm (TSSA) and variable per-tone selection algorithm at transmitter side. The support of high data-rate MIMO spatial multiplexing communication in OFDM WLAN systems conforming to IEEE802.11n standard requires the use of compact antennas. Using antenna selection in conjunction with higher order modal SMP-SCP-ULA provides an additional performance improveme ...Daha fazlası

Bildiri 2014 22nd IEEE Signal Processing and Communications Applications Conference (SIU) , pp. 3 - 364 10 Görüntülenme
Erişime Açık

Correlation between the expressions of leptin and its receptors (ObR, sObR) in gastric cancer

Asuman SAVAŞÇIHABEŞ

Objective: The expressions of leptin and its receptor (ObR) have been observed in human gastric cancer (GC) tissue. Leptin can promote the proliferation of GC cells. However, the correlation between leptin and ObR expressions in GC and the role of gastric ObR protein levels in patients with GC is still unclear. This study aimed to evaluate the relationship between leptin, gastric ObR protein and soluble leptin receptor (sObR) levels and whether their possible role of indicator in GC. Methods: Serum leptin, gastric leptin and serum sObR concentrations were determined in 30 male patients with GC ...Daha fazlası

Makale/Derleme 2016 Turkish Journal of Biochemistry 8 Görüntülenme
Erişime Açık

On the design and performance analysis of lowcorrelation compact space-multimode diversity stacked microstrip antenna arrays for mımo-ofdm wlans over statistically-clustered ındoor radio channels

Asuman SAVAŞÇIHABEŞ

The support of high spectral efficiency MIMO spatial-multiplexing communication in OFDM-based WLAN systems conforming to IEEE 802.11n standard requires the design and use of compact antennas and arrays with low correlation ports. For this purpose, compact space-multimode diversity provisioning stacked circular multimode microstrip patch antenna arrays (SCP-ULA) are proposed in this paper and their performance in terms of spatial and modal correlations, ergodic spectral efficiencies as well as compactness with respect to antenna arrays formed of vertically-oriented center-fed dipole elements (D ...Daha fazlası

Makale/Derleme 2015 Radioengineering Journal 11 Görüntülenme
Erişime Açık

On the comparative performance analysis of turbo-coded non-ıdeal single-carrier and multi-carrier waveforms over wideband vogler-hoffmeyer hf channels

Asuman SAVAŞÇIHABEŞ

The purpose of this paper is to compare the turbo-coded Orthogonal Frequency Division Multiplexing (OFDM) and turbo-coded Single Carrier Frequency Domain Equalization (SC-FDE) systems under the effects of Carrier Frequency Offset (CFO), Symbol Timing Offset (STO) and phase noise in wide-band Vogler-Hoffmeyer HF channel model. In mobile communication systems multipath propagation occurs. Therefore channel estimation and equalization is additionally necessary. Furthermore a nonideal local oscillator generally is misaligned with the operating frequency at the receiver. This causes carrier frequen ...Daha fazlası

Makale/Derleme 2014 Radioengineering Journal 16 Görüntülenme
Erişime Açık

A new PAPR and BER enhancement technique based on lifting wavelet transform and selected mapping method for the next generation waveforms

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Orthogonal frequency division multiplexing (OFDM) is widely used in many digital communication systems because of its immunity to inter-symbol interference, high spectral efficiency and capability of handling multipath. Walsh-Hadamard transform (WHT) and discrete wavelet transform (DWT) have also been suggested in order to enhance the performances of multi-carrier wireless communication systems. In general, high peak-to-average power ratio (PAPR) is one of the biggest disadvantages of these systems and OFDM also has this disadvantage. Many techniques such as amplitude clipping and filtering, e ...Daha fazlası

Makale/Derleme 2021 AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 7 Görüntülenme
Erişime Açık

A new fwht-cmf-dfe based approach for channel equalization in cp-free ofdm systems

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Orthogonal frequency division multiplexing (OFDM) has been widely used in wireless communication systems due to its robustness against the frequency selectivity of fading channels. It provides optimal performance and it also meets the requirements of the next generation communication systems. Although OFDM has these advantages, its spectrum efficiency is usually degraded significantly due to the use of cyclic prefix (CP). In this paper, motivated to deal with this issue, the combined structure of Fast Walsh-Hadamard Transform (FWHT) and Time Domain Equalizer (TDE) is proposed to use in CP-free ...Daha fazlası

Makale/Derleme 2021 Iet Communications 6 Görüntülenme
Erişime Açık

A novel combined double binary turbo coding and color shift keying technique for flicker mitigation in multi carrier visible light communications

Asuman SAVAŞÇIHABEŞ

Although radio frequency (RF) systems have been developed at a level that can operate almost within theoretical limits in terms of spectral efciency due to increasing demands, the RF spectrum allocated for wireless mobile communication has started to fll up rapidly and become insufcient. Visible light communication (VLC), one of the optical wireless communication systems, stands out as a promising technology that can be an alternative to RF technology in some application areas and can help meet the demands by playing a complementary role in some application areas. However, VLC systems face the ...Daha fazlası

Makale/Derleme 2022 WIRELESS PERSONAL COMMUNICATIONS- Q3 , pp. 1 - 17 3 Görüntülenme
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.
Tamam
creativecommons
Bu site altında yer alan tüm kaynaklar Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.
Platforms