Browsing Fakülteler by Title

Percolation of glassy regions during photopolymerization of epoxy acrylate in DMF

Doğruyol, Zekeriya; Arsu, Nergis; Doğruyol, Sevnur Keskin; Pekcan, Önder (Elsevier Science SA, 2015)

The gelation of epoxy acrylate (EA) 80% and tripropyleneglycol diacrylate (TPGDA) 20% was studied through the use of photo-differential scanning calorimetric (photo-DSC) technique in the presence of a thioxanthone based ...

Performance Analysis of Maximal Ratio Transmission with Relay Selection in Two-way Relay Networks Over Nakagami-m Fading Channels

Erdoğan, Eylem; Güçlüoğlu, Tansal (Springer, 2016)

In this paper we investigate the performance of an amplify-and-forward multi-input multi-output two way relay network where two sources are equipped with multiple antennas employing maximal ratio transmission and the ...

Performance analysis of transmit and receive antenna selection over flat fading channels

Güçlüoğlu, Tansal; Duman, Tolga M. (IEEE-INST Electrical Electronics Engineers Inc, 2008)

The paper considers two different antenna selection schemes for space-time coded systems over flat fading channels. First we explore antenna selection at the transmitter side based on the received signal to noise ratios. ...

Performance Improvement of Threshold Based Audio Steganography Using Parallel Computation

Shoaib, Muhammad; Shehzad, Danish; Umar, Arif Iqbal; Khan, Zakir; Dağ, Tamer; Ul Amin, Noor (Science & Information SAI Organization Ltd, 2016)

Audio steganography is used to hide secret information inside audio signal for the secure and reliable transfer of information. Various steganography techniques have been proposed and implemented to ensure adequate security ...

Performance Investigation of IEEE 802.11af Systems Under Realistic Channel Conditions

Macit, Mustafa Can; Şenol, Habib; Erküçük, Serhat (IEEE, 2015)

As the analog TV broadcasting channels have become less frequently used in the last decade there has been a great interest in these frequency bands for the deployment of metropolitan local and personal area networks. Among ...

Performance of Distributed Estimation Over Unknown Parallel Fading Channels

Şenol, Habib; Tepedelenlioglu, Cihan (IEEE-INST Electrical Electronics Engineers Inc, 2008)

We consider distributed estimation of a source in additive Gaussian noise observed by sensors that are connected to a fusion center with unknown orthogonal (parallel) flat Rayleigh fading channels. We adopt a two-phase ...

Performance of IEEE 802.15.4a Systems in the Presence of Narrowband Interference

Fındıklı, Çağlar; Erküçük, Serhat; Çelebi, Mehmet Ertuğrul (IEEE, 2011)

The regulatory agencies in Europe and Japan require the implementation of avoidance techniques in some bands to reduce interference to licensed systems. Accordingly ultra-wideband impulse radio (UWB-IR) based Wireless ...

Performance of MIMO Enhanced Unipolar OFDM With Realistic Indoor Visible Light Channel Models

Yeşilkaya, Anıl; Miramirkhani, Farshad; Basar, Ertugrul; Panayırcı, Erdal; Uysal, Murat (Institute of Electrical and Electronics Engineers Inc., 2016)

Visible light communication (VLC) involves the dual use of illumination infrastructure for high speed wireless access. Designing such optical based communication systems realistic indoor optical channel modeling becomes ...

Performance of space time codes with transmit antenna selection over frequency selective fading channels in the presence of channel estimation errors

Güçlüoğlu, Tansal; Panayırcı, Erdal (2008)

This paper presents a performance analysis of space-time coded systems with transmit antenna selection over frequency selective fading channels when the erroneously estimated fading coefficients are available only at the ...

Performance of space-time coded systems with transmit antenna selection

Güçlüoğlu, Tansal; Duman, Tolga M. (IEEE, 2007)

We deal with transmit antenna selection for space-time coded (STC) systems over multiple input multiple output (MIMO) channels. Using pairwise error probability analysis and simulation results we show that transmit antenna ...

Performance of spatial modulation in the presence of channel estimation errors

Basar, Ertuğrul; Aygölü, Ümit; Panayırcı, Erdal; Poor, H. Vincent (IEEE-INST Electrical Electronics Engineers Inc, 2012)

This work investigates the negative effects of channel estimation errors on the performance of spatial modulation (SM) when operating over flat Rayleigh fading channels. The pairwise error probability of the SM scheme is ...

Performance of Stack Equalizer over Frequency Selective Fading Channels

Güçlüoğlu, Tansal (IEEE, 2008)

In this paper the performance of the low complexity modified stack equalizer over frequency-selective fading channels is inspected. With the help of simulation results it is illustrated that by sacrificing the computational ...

Performance of stack equalizer over frequency selective fading channels [Frekansa ba?lı sönümlemeli kanallarda yi?it denkleştiricinin başarımı]

Güçlüoğlu, Tansal (2008)

In this paper the performance of the low complexity modified stack equalizer over frequency-selective fading channels is inspected. With the help of simulation results it is illustrated that by sacrificing the computational ...