by Institution Author "Panayirci, Erdal"
Now showing items 1-20 of 43
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Analysis of visible light communation sytems and adaptive equalization effects
Mamus, Atilla (Kadir Has Üniversitesi, 2015)Communication by means of visible light is a newly developing technology that has been brought up as an alternative to the current electromagnetic based communication systems. The recently conducted studies led to the use ... -
Channel estimation for visible light communications using neural networks
Yeşilkaya, Anıl; Karatalay, Onur; Öğrenci, Arif Selçuk; Panayırcı, Erdal (Institute of Electrical and Electronics Engineers Inc., 2016)Visible light communications (VLC) is an emerging field in technology and research. Estimating the channel taps is a major requirement for designing reliable communication systems. Due to the nonlinear characteristics of ... -
Channel estimation in underwater cooperative OFDM system with amplify-and-forward relaying
Şenol, Habib; Panayırcı, Erdal; Erdoğan, Mustafa; Uysal, Murat (IEEE, 2012)This paper is concerned with a challenging problem of channel estimation for amplify-and-forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in the presence of sparse underwater acoustic ... -
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 ... -
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 ... -
Femtocell design for data communications in mobile networks
Cogalan, Tezcan (Kadir Has Üniversitesi, 2013)in this thesis game theoretic utility-based adaptive power control algorithm for uplink of femtocell networks is performed for mitigation of interference in two different ways. The first one is allocation of femtocell ... -
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 ... -
Guest editorial: special issue on high mobility wireless communications
[Abstract Not Available] -
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 ... -
Interpolation Based Pilot-Aided Channel Estimation for STBC Spatial Modulation and Performance Analysis Under Imperfect CSI
Acar, Yusuf; Dogan, Hakan; Basar, Ertugrul; Panayırcı, Erdal (Inst Engineering Technology-IET, 2016)A combination of space-time block coding and spatial modulation (STBC-SM) has been recently proposed for multiple input-multiple output systems to obtain both spatial diversity gain and more capacity simultaneously while ... -
Iterative channel estimation for spatial modulation systems over fast fading channels [Hızlı sönümlemeli kanallarda uzaysal modülasyon sistemleri için iteratif kanal kestirimi]
Acar, Yusuf; Doğati, Hakan; Panayırcı, Erdal (IEEE Computer Society, 2014)Spatial Modulation (SM) based on the use of antenna indices to transmit information in addition to the conventional signal constellations has been recently proposed to solve practical problems encountered in MIMO systems. ... -
Iterative joint data detection and channel estimation for uplink MC-CDMA systems in the presence of frequency selective channels
This paper is concerned with joint multiuser detection and multichannel estimation (JDE) for uplink multicarrier code-division multiple-access (MC-CDMA) systems in the presence of frequency selective channels. The detection ... -
Joint phase noise estimation and source detection [Ortak faz gürültüsü kestirimi ve kaynak sezimlemesi]
Rapidly time-varying and random disturbing effects on the phase of a signal waveform are known as phase noise. In this paper we consider the problem of joint detection of continuous-valued information source output and ... -
Low-complexity joint data detection and channel equalisation for highly mobile orthogonal frequency division multiplexing systems
Dogan, Hakan; Panayırcı, Erdal; Poor, H. Vincent (2010)This study is concerned with the challenging and timely problem of channel equalisation and data detection for orthogonal frequency division multiplexing (OFDM) systems in the presence of frequency-selective and very rapidly ... -
A low-complexity KL expansion-based channel estimator for OFDM systems
This paper first proposes a computationally efficient pilot-aided linear minimum mean square error (MMSE) batch channel estimation algorithm for OFDM systems in unknown wireless fading channels. The proposed approach employs ... -
Modelling of visible light channels and performance analysis for optical ofdm systems
Alsan, Hüseyin Fuat (Kadir Has Üniversitesi, 2016)This work is concerned with a challenging problem of modeling and simulation of visible light communications (VLC) channels for optical wireless communication (OWC) systems. A proper channel model for VLC is absent in the ... -
A Monte Carlo implementation of the SAGE algorithm for joint soft-multiuser decoding channel parameter estimation and code acquisition
This paper presents an iterative scheme for joint timing acquisition multi-channel parameter estimation and multiuser soft-data decoding. As an example an asynchronous convolutionally coded direct-sequence code-division ... -
Monte Carlo Solutions for Blind Phase Noise Estimation
Simoens, Frederik; Duyck, Dieter; Cirpan, Hakan Ali; Panayırcı, Erdal; Moeneclaey, Marc (Springer International Publishing Ag, 2009)This paper investigates the use of Monte Carlo sampling methods for phase noise estimation on additive white Gaussian noise (AWGN) channels. The main contributions of the paper are (i) the development of a Monte Carlo ... -
New channel estimation techniques for cooperative underwater acoustic OFDM systems
Mustafa, Erdoğan (Kadir Has Üniversitesi, 2013)Cooperative underwater acoustic communication systems come into prominence in recent years. Since underwater channels are sparse and additive noise entering the system is colored Gaussian noise it is very difficult to ... -
New Trellis Code Design for Spatial Modulation
Basar, Ertugrul; Aygölü, Ümit; Panayırcı, Erdal; Poor, H. Vincent (IEEE-INST Electrical Electronics Engineers Inc, 2011)Spatial modulation (SM) in which multiple antennas are used to convey information besides the conventional M-ary signal constellations is a new multiple-input multiple-output (MIMO) transmission technique which has recently ...