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5G challenges : Waveform design and D2D communication
Takshi, Hengameh (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Fifth generation (5G) of communication systems is expected to satisfy a wide variety of requirements with regards to different applications. Flexibility, low latency, low power consumption are the most important ones. Using ... -
Advanced cross-layer secure communication designs for future wireless systems
Hamamreh, Jehad Mahmoud Amin (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Due to the inherent vulnerability of wireless transmission to eavesdropping, con- dentiality arises as a challenging issue especially for future wireless networks because of their unique requirements. To cope with this, ... -
Aerial platforms utilization for future networks
Abdelkhalek, Mostafa Helmy Mohamed (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Challenges facing the next generation of communication systems include utilizing the wireless networks in the rural areas and disaster situations, as well as the requirements of high capacity services and connectivity ... -
Air-ground channel modeling and waveform containment
İbrahim, Mostafa (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)The content of this work is divided into two main parts. Part I is dedicated for characterizing Air-Ground channels. Applications using Air-Ground communications are expected to grow in the future. Low altitude phases of ... -
Developing novel radio resource management techniques for 5G and beyond
Yazar, Ahmet (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)Application richness and the level of technological development have increased extraordinarily in the last ten years in the field of modern wireless communications. There is a need for a flexible communications infrastructure ... -
Developing novel spectrum occupancy prediction and physical layer security techniques
Aygül, Mehmet Ali (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)Wireless communication systems have pervaded every aspect of our lives; from financial transactions to health records, from entertainment to work, from education to travelling. This extensive usage of wireless devices is ... -
Emulation techniques for small scale fading aspects of wireless channels by using reverberation chamber
Kihero, Abuu Bakari (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Reverberation chambers (RVCs) are used to provide an effective and reliable testbed for emulating wireless channel effects in the laboratory environment. Various techniques that enrich the capabilities of the RVC in channel ... -
Interference and channel control techniques for the future of wireless communications
Tusha, Seda (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)Interference and random behavior of the propagation environment are the main impediments to serve a broad range of applications and use-cases in modern communication systems. Although conventional orthogonal multiple ... -
NOMA multi-numerology and guard reduction methods in OFDM systems for 5g networks
Sabah, Ayman Tayseer Ali Abu (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Non-orthogonal multiple access (NOMA) is a promising technique which outperforms the traditional multiple access schemes in many aspects. It uses superposition coding (SC) to share the available resources among the users ... -
OFDM with index modulation for narrowband iot and mmtc
Tusha, Armed (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)The crucial aim for 5G narrowband Internet of Things (NB-IoT) is to support massive Machine-Type Communications (mMTC) with wide coverage area, low power consumption, low hardware complexity and low data rate. Direct ... -
On the design of a flexible waveform and low ici symbol boundary alignment
Nemati, Mahyar (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)Cellular systems of fifth generation (5G) radio access technology is expected to support a wide variety of service requirements in different applications. High reliability, flexibility, spectral efficiency, and low power ... -
Physical layer security schemes for wireless communication systems
Yusuf, Marwan (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2016)Security in wireless communications has always been a major concern due to the broadcast nature of the radio waves. Apart from the conventional cryptologic methods that are performed in the upper layers, physical-layer ... -
Physical layer security techniques for future wireless communication systems against eavesdropping
Madni, Haji Muhammad Furqan Ahmed (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)The inherent broadcast characteristics of wireless communication make it vulnerable to passive eavesdropping. Conventionally, security techniques in the upper layers like cryptography-based techniques have been employed ... -
Signal processing techniques for security enhancement of wireless networks at the physical layer
Soltani, Morteza (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)Broadcast nature of wireless communications enables reaching multiple parties simultaneously. However, due to this property, the security of information trans- mission is prone to eavesdropping of unauthorized receivers. ...