Browsing Lisansüstü Eğitim Enstitüsü by Author "Erküçük, Serhat"
Now showing items 1-9 of 9
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Coexistence of cognitive radio based networks in tv white space
Karatalay, Onur (Kadir Has Üniversitesi, 2016)Due to increasing data rates in enhancing wireless communications RF spectrum which is one of the most crucial natural sources has become more valuable. in order to utilize the limited spectrum e_ciently and solve the ... -
Detection of interdependent multiband systems for cognitive radios and ultra-wideband systems
Yılmaz, Burak (Kadir Has Üniversitesi, 2012)As a result of advances in the wireless technology new systems have been proposed and hence more frequency bands are occupied in the spectrum. Therefore the number ofavailable frequency bands for future wireless communication ... -
Performance of ieee 802.11af systems under realistic channel conditions
Macit, Mustafa Can (Kadir Has Üniversitesi, 2016)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 regional local and personal area networks. Among ... -
Performance of orbital angular momentum based communication systems under varied atmospheric turbulence
Ashfaq Sheikh, Abdul Ahad (Kadir Has Üniversitesi, 2016)Orbital Angular Momentum is gaining a lot of attention in the past years as it is providing the means to break free from the ever increasing shortage of options when it comes to Data Rates and Effective Frequency Utilization. ... -
Power control and multihop communication approaches for the coexistence of ieee 802.11af and iEEE 802.22 networks in tv white space
Ulgen, Oguz (Kadir Has Üniversitesi, 2017)Communication networks have been among the most important research fields of scientists in the recent years. Researches have been conducted in various different topics and contents as technology has evolved. As some new ... -
Primary user detection in Ultrawide-band based wireless sensor networks
Sabucu, Yağmur (Kadir Has Üniversitesi, 2013)in this thesis ultra-wideband (UWB) based wireless sensor networks (WSNs) are considered for the detection of a primary user. Different from earlier works (i) both uplink and downlink information of the primary user are ... -
Realistic performance considerations for combinational cooperative detection method
Samo, Rameez Ahmed (Kadir Has Üniversitesi, 2016)Combinational cooperative detection (CCD) method is different from the conventional cooperative detection method in the sense that each user may reach a different decision for the activity of the primary user. in the CCD ... -
SCMA codebook design approaches
Kiracı, Furkan (Kadir Has Üniversitesi, 2020)In 4G systems, Orthogonal Frequency-Division Multiple Access (OFDMA) has been used conventionally for multiple access purposes. This technique has low spectral efficiency since it allocates the resources orthogonally to ... -
SISO - MIMO applications and analysis of visible light communications systems
Yeşilkaya, Anıl (Kadir Has Üniversitesi, 2016)Rapid development in technology and increasing necessity to reach information instantaneously saturates RF bands rapidly. Because of that, it can be seen that we are gradually approaching upper limits of the band. It can ...