Fırat Üniversitesi-Elazığ İLETİM HATTI MATRİS MODELİ İLE MİKROSTRİP HATLARIN ANALİZİ Ayhan AKBAL ... more Fırat Üniversitesi-Elazığ İLETİM HATTI MATRİS MODELİ İLE MİKROSTRİP HATLARIN ANALİZİ Ayhan AKBAL Fırat Üniversitesi Elektrik-Elektronik Müh. Bölümü ayhanakbal@gmail.com Hasan H. BALIK İstanbul Arel Üniversitesi Bilgisayar Müh. Bölümü hasanbalik@gmail.com ...
Yüksek spektrum verimliliğinden dolayı MSK (Minimum Shift Keying: Minimum Kaydırmalı Anahtarlama)... more Yüksek spektrum verimliliğinden dolayı MSK (Minimum Shift Keying: Minimum Kaydırmalı Anahtarlama) tekniği birçok haberleşme alanında tercih edilen modülasyon tekniklerinden birisi olmuştur. Dolayısıyla bu tekniğin donanımsal uygulamalarında kaynak kullanımının düşürülmesi oldukça önemlidir. Yapılan çalışmada MSK modülasyon tekniği için RAM bit kullanımının düşürülmesine yönelik bir çalışma gerçekleştirilmiştir. RAM bit kullanımı geleneksel MSK modülasyon tekniğine göre yaklaşık olarak %83 oranında düşürülmüştür. Ayrıca yapılan çalışma Altera DE-0 Nano kart üzerinde uygulanarak gerçek zamanlı deneysel sonuçlar elde edilmiştir.
Satellite communications (SatComs) recently, have admitted as a new technological advances that a... more Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment and ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of technology on sequential tasks, to the progress of canonical protocols accepted by space agencies of lots of countries. Satellite communication has accepted as one of the important technologies for 5G backhauling, particularly on bandwidth request increased in 5G mobile broad band (eMBB) applications. This paper presents the efficiency of the satellite communication system using 16 QAM digital modulation technique for the X band. This digital modulation method presents high data rate in transmission without raising the bandwidth compared with other digital modulation methods. Applications are realized in Matlab environment and obtained conclusions are discussed such as power spectrum diagrams, constellation schemas and BER ratio for several bands such as 4,
Satellite communications (SatComs) recently, have admitted as a new technological advances that a... more Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment and ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of technology on sequential tasks, to the progress of canonical protocols accepted by space agencies of lots of countries. Satellite communication has accepted as one of the important technologies for 5G backhauling, particularly on bandwidth request increased in 5G mobile broad band (eMBB) applications. This paper presents the efficiency of the satellite communication system using 16 QAM digital modulation technique for the X band. This digital modulation method presents high data rate in transmission without raising the bandwidth compared with other digital modulation methods. Applications are realized in Matlab environment and obtained conclusions are discussed such as power spectrum diagrams, constellation schemas...
Kablosuz haberlesme sistemleri son yilarda kullanim alani artan haberlesme sistemleridir. Bu sist... more Kablosuz haberlesme sistemleri son yilarda kullanim alani artan haberlesme sistemleridir. Bu sistemlerin kullanimlarinin artmasina bagli olarak modulator tasarimi da onemli hale gelmistir. Kablosuz haberlesme sistemlerinde kullanilan modulator tasariminda ikili modulasyon tekniklerinden BPSK (Binary Phase Shift Keying: Ikili Faz Kaydirmali Anahtarlama) en cok kullanilan modulasyon tekniklerindendir. Bu calismada iki farkli gercek zamanli sistemde tasarlanan BPSK modulatorleri cikisindaki isaretlerin benzetim sonuclarina yer verilmistir. Tasarlanan modulatorlerden birisi MATLAB/Simulink programi kullanilarak olusturulmustur. Diger modulator ise FPGA derleyicisi Quartus II 9.1sp2 programi kullanilarak gerceklestirilmistir. FPGA derleyicisinde tasarlanan modulator mux tabanli olarak gerceklestirilmistir ve iletilmek istenen veri bitinin durumuna gore (1 ya da 0 olma durumu) veri transferi gerceklestirilmektedir. MATLAB/Simulink programinda ise mux yerine switch kullanilarak modulator t...
Binary phase shift keying (BPSK) and quadrature phase shift Keying (QPSK) modulation techniques a... more Binary phase shift keying (BPSK) and quadrature phase shift Keying (QPSK) modulation techniques are often proposed for satellite communications and band-limited communication channels; however, both modulations are important in high speed data communications. High speed data communications are implemented on high speed hardware in wireless systems. The paper presents the design of a QPSK and BPSK digital communication modulators and their implementations on high speed fieldprogrammable gate array (FPGA) using Quartus II. Also, for these modulation schemes, resource utilization was introduced. Both modulations were designed in Quartus II using VHDL hardware description language. It was shown that transmission of QPSK modulator is fast than transmission of BPSK modulator at the same bit error performance. According to BPSK, QPSK modulator uses more memory. But other resources equal to for these modulation. Principles of the BPSK modulation and QPSK modulation are illustrated using schematic diagrams. The analysis of theoretical aspects of the BPSK and QPSK modulations are represented. Both modulations waveforms are illustrated using a simulation program. Implementations of the BPSK and QPSK systems on FPGA are shown using algorithms of modulator.
... Dalgaların E.coli'nin Gelişimine Etkisi Ayhan AKBAL Elektrik-Elektronik Mühendisliği Fır... more ... Dalgaların E.coli'nin Gelişimine Etkisi Ayhan AKBAL Elektrik-Elektronik Mühendisliği Fırat Üniversitesi Elazığ ayhan_akbal@firat.edu.tr Hasan H. BALIK Elektrik-Elektronik Mühendisliği İstanbul Arel Üniversitesi İstanbul hasanbalik@gmail.com ...
Turkish Journal of Science and Technology, Oct 1, 2017
Orthogonal frequency division multiplex (OFDM) is one of the best approaches to overcome frequenc... more Orthogonal frequency division multiplex (OFDM) is one of the best approaches to overcome frequency selectivity of channels. In multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems, we purposed channel estimation with least squares (LS) estimation method in this paper. To improve channel estimation achievement a LS algorithm is developed, so we obtain Bit Error Rate (BER) performance of channel. Mean Square Error (MSE) of LS estimation calculated and depicted with figures. Signal to noise ratio (SNR) indicated notable efficacy in this paper that obtained by using the LS algorithm, in particular channels with variation in time.
Filter bank multi carrier (FBMC) shows better spectral properties compared orthogonal frequency d... more Filter bank multi carrier (FBMC) shows better spectral properties compared orthogonal frequency division multiplexing (OFDM). Double selective channels are described time selectivity and frequency selectivity which explore their performance variance in this paper. Closed form bit error probability (BEP) derives one top equalizers linear modulation techniques with OFDM and FBMC structures. When interference is closed to Gaussian noise, BEP error researching and Monte Carlo simulations are validated our analytically calculations. This paper presents us three scenarios that are OFDM without cyclic prefix (CP), CP-OFDM and FBMC applications about BEP over signal to noise ratio (SNR) for different channel models and different velocities. Applications are realized for theoretical, Gaussian approach, simulations and variations are shown with figures. The obtained BEP expressions utilize to define time variant propagation for OFDM and FBMC.
Fifth International Conference On Advances in Computing, Electronics and Electrical Technology - CEET 2016, 2016
The logs generated by the operating systems, and application programs, network devices, web brows... more The logs generated by the operating systems, and application programs, network devices, web browsers and all devices in the information systems during their normal course of operation are very important and allow system administrators to ensure that they have a reliable information system, and track what is going on in the IS, such as what web sites clients visited, whom they are sending e-mails to and receiving e-mails from and what applications are accessed. The main goal of this study is to develop software which can parse both logs generated by the information systems (IS) in real time and logs written to historical text files, and store logs in a central database in order to perform various analyses for reporting and detecting anomaly tasks on the system. Daily log entries belonging to the information systems department of Firat University Hospital are applied with the program and various analysis results were obtained. In general, information systems logs can be easily analyzed and converted into information.
Fırat Üniversitesi-Elazığ İLETİM HATTI MATRİS MODELİ İLE MİKROSTRİP HATLARIN ANALİZİ Ayhan AKBAL ... more Fırat Üniversitesi-Elazığ İLETİM HATTI MATRİS MODELİ İLE MİKROSTRİP HATLARIN ANALİZİ Ayhan AKBAL Fırat Üniversitesi Elektrik-Elektronik Müh. Bölümü ayhanakbal@gmail.com Hasan H. BALIK İstanbul Arel Üniversitesi Bilgisayar Müh. Bölümü hasanbalik@gmail.com ...
Yüksek spektrum verimliliğinden dolayı MSK (Minimum Shift Keying: Minimum Kaydırmalı Anahtarlama)... more Yüksek spektrum verimliliğinden dolayı MSK (Minimum Shift Keying: Minimum Kaydırmalı Anahtarlama) tekniği birçok haberleşme alanında tercih edilen modülasyon tekniklerinden birisi olmuştur. Dolayısıyla bu tekniğin donanımsal uygulamalarında kaynak kullanımının düşürülmesi oldukça önemlidir. Yapılan çalışmada MSK modülasyon tekniği için RAM bit kullanımının düşürülmesine yönelik bir çalışma gerçekleştirilmiştir. RAM bit kullanımı geleneksel MSK modülasyon tekniğine göre yaklaşık olarak %83 oranında düşürülmüştür. Ayrıca yapılan çalışma Altera DE-0 Nano kart üzerinde uygulanarak gerçek zamanlı deneysel sonuçlar elde edilmiştir.
Satellite communications (SatComs) recently, have admitted as a new technological advances that a... more Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment and ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of technology on sequential tasks, to the progress of canonical protocols accepted by space agencies of lots of countries. Satellite communication has accepted as one of the important technologies for 5G backhauling, particularly on bandwidth request increased in 5G mobile broad band (eMBB) applications. This paper presents the efficiency of the satellite communication system using 16 QAM digital modulation technique for the X band. This digital modulation method presents high data rate in transmission without raising the bandwidth compared with other digital modulation methods. Applications are realized in Matlab environment and obtained conclusions are discussed such as power spectrum diagrams, constellation schemas and BER ratio for several bands such as 4,
Satellite communications (SatComs) recently, have admitted as a new technological advances that a... more Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment and ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of technology on sequential tasks, to the progress of canonical protocols accepted by space agencies of lots of countries. Satellite communication has accepted as one of the important technologies for 5G backhauling, particularly on bandwidth request increased in 5G mobile broad band (eMBB) applications. This paper presents the efficiency of the satellite communication system using 16 QAM digital modulation technique for the X band. This digital modulation method presents high data rate in transmission without raising the bandwidth compared with other digital modulation methods. Applications are realized in Matlab environment and obtained conclusions are discussed such as power spectrum diagrams, constellation schemas...
Kablosuz haberlesme sistemleri son yilarda kullanim alani artan haberlesme sistemleridir. Bu sist... more Kablosuz haberlesme sistemleri son yilarda kullanim alani artan haberlesme sistemleridir. Bu sistemlerin kullanimlarinin artmasina bagli olarak modulator tasarimi da onemli hale gelmistir. Kablosuz haberlesme sistemlerinde kullanilan modulator tasariminda ikili modulasyon tekniklerinden BPSK (Binary Phase Shift Keying: Ikili Faz Kaydirmali Anahtarlama) en cok kullanilan modulasyon tekniklerindendir. Bu calismada iki farkli gercek zamanli sistemde tasarlanan BPSK modulatorleri cikisindaki isaretlerin benzetim sonuclarina yer verilmistir. Tasarlanan modulatorlerden birisi MATLAB/Simulink programi kullanilarak olusturulmustur. Diger modulator ise FPGA derleyicisi Quartus II 9.1sp2 programi kullanilarak gerceklestirilmistir. FPGA derleyicisinde tasarlanan modulator mux tabanli olarak gerceklestirilmistir ve iletilmek istenen veri bitinin durumuna gore (1 ya da 0 olma durumu) veri transferi gerceklestirilmektedir. MATLAB/Simulink programinda ise mux yerine switch kullanilarak modulator t...
Binary phase shift keying (BPSK) and quadrature phase shift Keying (QPSK) modulation techniques a... more Binary phase shift keying (BPSK) and quadrature phase shift Keying (QPSK) modulation techniques are often proposed for satellite communications and band-limited communication channels; however, both modulations are important in high speed data communications. High speed data communications are implemented on high speed hardware in wireless systems. The paper presents the design of a QPSK and BPSK digital communication modulators and their implementations on high speed fieldprogrammable gate array (FPGA) using Quartus II. Also, for these modulation schemes, resource utilization was introduced. Both modulations were designed in Quartus II using VHDL hardware description language. It was shown that transmission of QPSK modulator is fast than transmission of BPSK modulator at the same bit error performance. According to BPSK, QPSK modulator uses more memory. But other resources equal to for these modulation. Principles of the BPSK modulation and QPSK modulation are illustrated using schematic diagrams. The analysis of theoretical aspects of the BPSK and QPSK modulations are represented. Both modulations waveforms are illustrated using a simulation program. Implementations of the BPSK and QPSK systems on FPGA are shown using algorithms of modulator.
... Dalgaların E.coli'nin Gelişimine Etkisi Ayhan AKBAL Elektrik-Elektronik Mühendisliği Fır... more ... Dalgaların E.coli'nin Gelişimine Etkisi Ayhan AKBAL Elektrik-Elektronik Mühendisliği Fırat Üniversitesi Elazığ ayhan_akbal@firat.edu.tr Hasan H. BALIK Elektrik-Elektronik Mühendisliği İstanbul Arel Üniversitesi İstanbul hasanbalik@gmail.com ...
Turkish Journal of Science and Technology, Oct 1, 2017
Orthogonal frequency division multiplex (OFDM) is one of the best approaches to overcome frequenc... more Orthogonal frequency division multiplex (OFDM) is one of the best approaches to overcome frequency selectivity of channels. In multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems, we purposed channel estimation with least squares (LS) estimation method in this paper. To improve channel estimation achievement a LS algorithm is developed, so we obtain Bit Error Rate (BER) performance of channel. Mean Square Error (MSE) of LS estimation calculated and depicted with figures. Signal to noise ratio (SNR) indicated notable efficacy in this paper that obtained by using the LS algorithm, in particular channels with variation in time.
Filter bank multi carrier (FBMC) shows better spectral properties compared orthogonal frequency d... more Filter bank multi carrier (FBMC) shows better spectral properties compared orthogonal frequency division multiplexing (OFDM). Double selective channels are described time selectivity and frequency selectivity which explore their performance variance in this paper. Closed form bit error probability (BEP) derives one top equalizers linear modulation techniques with OFDM and FBMC structures. When interference is closed to Gaussian noise, BEP error researching and Monte Carlo simulations are validated our analytically calculations. This paper presents us three scenarios that are OFDM without cyclic prefix (CP), CP-OFDM and FBMC applications about BEP over signal to noise ratio (SNR) for different channel models and different velocities. Applications are realized for theoretical, Gaussian approach, simulations and variations are shown with figures. The obtained BEP expressions utilize to define time variant propagation for OFDM and FBMC.
Fifth International Conference On Advances in Computing, Electronics and Electrical Technology - CEET 2016, 2016
The logs generated by the operating systems, and application programs, network devices, web brows... more The logs generated by the operating systems, and application programs, network devices, web browsers and all devices in the information systems during their normal course of operation are very important and allow system administrators to ensure that they have a reliable information system, and track what is going on in the IS, such as what web sites clients visited, whom they are sending e-mails to and receiving e-mails from and what applications are accessed. The main goal of this study is to develop software which can parse both logs generated by the information systems (IS) in real time and logs written to historical text files, and store logs in a central database in order to perform various analyses for reporting and detecting anomaly tasks on the system. Daily log entries belonging to the information systems department of Firat University Hospital are applied with the program and various analysis results were obtained. In general, information systems logs can be easily analyzed and converted into information.
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