Browsing Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed by Author "Panayırcı, Erdal"
Now showing items 21-40 of 140
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Design and performance analysis of a novel trellis coded space-time-frequency OFDM transmission scheme
Oğuz, Onur; Aygölü, Ümit; Panayırcı, Erdal (Wiley-Blackwell, 2008)In this paper a new transmit diversity technique is proposed for wireless communications over frequency selective fading channels. The proposed technique utilises orthogonal frequency division multiplexing (OFDM) to transform ... -
Effect of channel estimation errors on the performance of space time coded systems with antenna selection
Güçlüoğlu, Tansal; Panayırcı, Erdal (IEEE, 2007)This paper presents the effects of channel estimation errors on the performance especially diversity gain of space-time coded systems with antenna selection. We consider maximum signal to noise ratio as the antenna selection ... -
Effect of channel estimation errors on the performance of space time coded systems with antenna selection
Güçlüoğlu, T.; Panayırcı, Erdal (2007)This paper presents the effects of channel estimation errors on the performance, especially diversity gain, of space-time coded systems with antenna selection. We consider maximum signal to noise ratio as the antenna ... -
Effect of power and rate adaptation on the spectral efficiency of MQAM/OFDM system under very fast fading channels
Dong, Zhicheng; Fan, Pingzhi; Panayırcı, Erdal; Mathiopoulos, P. Takis (Springer International Publishing Ag, 2012)In this article the effect of power and rate adaptation on the spectral efficiency of orthogonal frequency division multiplexing (OFDM) systems using M-ary quadrature amplitude modulation (MQAM) is investigated in the ... -
An efficient joint channel estimation and decoding algorithm for turbo-coded space-time orthogonal frequency division multiplexing receivers
Doğan, Hakan; Çırpan, Hakan Ali; Panayırcı, Erdal (Inst Engineering Technology-IET, 2008)The challenging problem in the design of digital receivers of today's and future high-speed high data-rate wireless communication systems is to implement the optimal decoding and channel estimation processes jointly in a ... -
An efficient joint data detection and channel estimation technique for uplink MC-CDMA systems based on SAGE algorithm
Panayırcı, Erdal; Doğan, Hakan; Çırpan, Hakan Ali; Fleury, Bernard Henri (IEEE, 2007)This paper is concerned with joint channel estimation and data detection for uplink multicarrier code-division multiple-access (MC-CDMA) systems in the presence of frequency fading channel. The detection and estimation ... -
An Efficient SAGE-based Data Detection Algorithm for OFDM Systems in the Presence of Very Fast Fading Channels
Dong, Zhicheng; Fan, Pingzhi; Panayırcı, Erdal (IEEE, 2013)In this paper an iterative and computationally efficient data detection algorithm is proposed based on the space alternating generalized expectation maximization (SAGE) technique for orthogonal division multiplexing (OFDM) ... -
EM-based joint data detection and channel estimation for uplink MC-CDMA systems over frequency selective channels
Doğan, Hakan; Panayırcı, Erdal; Çırpan, Hakan Ali; Fleury, Bernard Henri (IEEE, 2007)This paper is concerned with joint channel estimation and data detection for uplink multicarrier code-division multiple-access (MC-CDMA) systems in the presence of frequency fading channel. The detection and estimation ... -
EM-Based MAP channel estimation and data detection for downlink MCC-CDMA systems
Doğan, Hakan; Panayırcı, Erdal; Çırpan, Hakan Ali (IEEE, 2007)In this work we propose a joint MAP channel estimation and data detection technique based on the Expectation Maximization (EM) method with paralel interference cancelation(PIC) for downlink multi-carrier (MC) code division ... -
EM-MAP based initialization of PIC receiver for downlink MC-CDMA systems
Doğan, Hakan; Cirpan, Hakan Ali; Panayırcı, Erdal (IEEE, 2007)The quality of multiple access interference (MAI) which can be improved by using channel estimation and data estimation of all active users effects considerably the performance of PIC detector. Therefore data and channel ... -
Energy-Efficient Resources Allocation with Millimeter-Wave Massive MIMO in Ultra Dense HetNets by SWIPT and CoMP
Yonghong Dai, Bin Li,; Dong, Zhicheng; Panayırcı, Erdal; Jiang, Huilin; Jiang, Hao (Institute of Electrical and Electronics Engineers Inc., 2021)Ultra-dense HetNets (UDN)-based Millimeter-Wave (mmWave) massive MIMO is considered a promising technology for 5th generation (5G) wireless communications systems since it can offer massively available bandwidth and improve ... -
Flexible LED Index Modulation for MIMO Optical Wireless Communications
Yeşilkaya, Anıl; Purwita, Ardimas Andi; Panayırcı, Erdal; Poor, H. Vincent; Haas, Harald (Institute of Electrical and Electronics Engineers Inc., 2020)The limited bandwidth of optical wireless communication (OWC) front-end devices motivates the use of multipleinput- multiple-output (MIMO) techniques to enhance data rates. It is known that very high multiplexing gains can ... -
Flexible physical layer based resource allocation for machine type communications towards 6G
Şadi, Yalçın; Erküçük, Serhat; Panayırcı, Erdal (Institute of Electrical and Electronics Engineers Inc., 2020)The exponential growth of Internet of Things applications necessitates the design of next generation cellular systems to provide native support for machine type communications (MTC). While 5G aims at providing this native ... -
Frequency selective fading channel estimation in OFDM systems using KL expansion
This paper proposes a computationally efficient linear minimum mean square error (MMSE) channel estimation algorithm based on KL series expansion for OFDM systems. Based on such expansion no matrix inversion is required ... -
Generalized LED Index Modulation Optical OFDM for MIMO Visible Light Communications Systems
Basar, Ertuğrul; Panayırcı, Erdal; Uysal, Murat; Haas, Harald (IEEE, 2016)In this paper we propose a generalized light emitting diode (LED) index modulation scheme for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) visible light communications (VLC) systems. ... -
Gezgin iletişim sistemlerinde alıcı tasarımı için yeni ileri sinyal işleme algoritmalarının geliştirilmesi
Çırpan, Hakan Ali; Panayırcı, Erdal (2007)[Abstract Not Available] -
Görünür Isıkla Haberlesmede Fiziksel Katman Güvenligi
Optik Kablosuz Haberlesme ve bunun olası bir uygulaması olan Görünür Isıkla Haberlesme (Visible Light Communications (VLC)), sahip oldugu çok yüksek bant genisligi, bilgi iletim kapasitesi, elektromanyetik girisimlere karsı ... -
Guest editorial: special issue on high mobility wireless communications
[Abstract Not Available] -
IEEE 802.15.7r1 Reference Channel Models for Visible Light Communications
Miramirkhani, Farshad; Narmanlıoğlu, Ömer; Baykas, Tuncer; Uysal, Murat; Panayırcı, Erdal (IEEE-Inst Electrical Electronics Engineers Inc, 2017)The IEEE has established the standardization group 802.15.7r1 "Short Range Optical Wireless Communications", which is currently in the process of developing a standard for visible light communication (VLC). As with any ... -
An Improved Adaptive Subspace Tracking Algorithm Based on Approximated Power Iteration
Wu, Qiang; Zheng, Jian-Sheng; Dong, Zhicheng; Panayırcı, Erdal; Wu, Zhi-Qiang; Ren, Qingnuobu (IEEE-INST Electrical Electronics Engineers Inc, 2018)A subspace tracking technique has drawn a lot of attentions due to its wide applications. The main objective of this approach is to estimate signal or noise subspace basis for the sample covariance matrix. In this paper ...