Comparison of New Multi-carrier Modulation Schemes under Amplifier Nonlinearity

OFDM is an essential part of the physical layer structure in 4G communication systems. Despite having many advantages compared to other modulation types, OFDM has the significant drawback of causing high out-of-band emissions (OOBE). This resulted in the consideration of alternative modulation schemes for the future communication standards. In this work, two of those alternatives, namely GFDM and WCP-COQAM are compared with OFDM under the efTects of digital-to- analog converter (DAC) and power-amplifier (PA) non-Iinearity taking into account the spectral mask requirements in the LTE standard. The performance metrics used in the comparisons are the error-vector magnitude (EVM), signal-to-intereference ratio (SIR) and average powers of the transmitted signals using the 3 modulation schemes. The results turned out to be such that there is no significant difference between the 3 modulation types in terms of the performance metrics taken into consideration.
24th Signal Processing and Communication Application Conference (SIU)


Investigation of energy efficient traffic adaptive mac layer protocols for multi-hop ad-hoc networks
Senem, Murat; Baykal, Buyurman; Department of Electrical and Electronics Engineering (2017)
Multi Hop Ad-Hoc Networks typically refer to interconnected sensing devices with limited processing, communication, and power capabilities. Self-organization, reliability, and energy efficiency are important issues in these networks. Energy efficient, traffic adaptive, multi-channel, and schedule based MAC Layer protocols have been studied for ad-hoc networks in this thesis. Medium sharing problem is one of the most important topic for multi hop ad-hoc networks, especially under intensive data traffic. In r...
Diversity Analysis of Hierarchical Modulation in Wireless Relay Networks
Yalcyn, Ahmet Zahid; Yüksel Turgut, Ayşe Melda (2014-07-01)
In communication systems, hierarchical modulation is used to increase system robustness and to send different information flows simultaneously. However, when used in cooperative communication systems, hierarchical modulation is prone to error propagation, which is the most important problem that prevents the achievement of full diversity gains. Depending on the signal-to-noise ratio between the source and the relay, threshold digital relaying can be used to mitigate error propagation. Mitigating error propa...
Immune system-based energy efficient and reliable communication in wireless sensor networks
Atakan, Baris; Akan, Oezguer B. (2006-12-01)
Wireless sensor networks (WSNs) are event-based systems that rely on the collective effort of densely deployed sensor nodes. Due to the dense deployment, since sensor observations are spatially correlated with respect to location of sensor nodes, it may not be necessary for every sensor node to transmit its data. Therefore, due to the resource constraints of sensor nodes, it is imperative to select the minimum number of sensor nodes to transmit the data to the sink. Furthermore, to achieve the application-s...
Detection of the distribution and parameter estimation for the departing connectivity in biological networks
Odunsi, Omolola Dorcas; Purutçuoğlu Gazi, Vilda; Department of Statistics (2014)
The connectivity density is one of the characteristics features in the topology of the network. This density describes the total number of the in-degree and out-degree of a node in a system. In a network, the in-degree or arriving connectivity represents the number of links coming to a target gene and the out-degree or departing connectivity stands for the number of links departing from the target gene. For biological networks, the density of the in-degree is represented by the exponential distribution and ...
Implementation and evaluation of the dependability plane for the dynamic distributed dependable real time industrial protocol ((D₃RIP))
Sezer, Ömer Berat; Schmidt, Şenan Ece; Schmidt, Kalus Werner; Department of Electrical and Electronics Engineering (2013)
Dynamic Distributed Dependable Real Time Ethernet Industrial Protocol (D3RIP) is a real time industrial communication protocol that runs over shared-medium Ethernet with COTS hardware. The protocol consists of an interface layer that enables time slotted communication and a coordination layer that guarantees collision avoidance and timely delivery of real time messages generated by the control application. At the current development stage, these two layers of the protocol are fully implemented and tested. T...
Citation Formats
A. B. Üçüncü and A. Ö. Yılmaz, “Comparison of New Multi-carrier Modulation Schemes under Amplifier Nonlinearity,” presented at the 24th Signal Processing and Communication Application Conference (SIU), Zonguldak, TURKEY, 2016, Accessed: 00, 2020. [Online]. Available: