Browsing Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed by Author "Panayırcı, Erdal"
Now showing items 61-80 of 140
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A low-complexity time-domain MMSE channel estimator for space-time/frequency block-coded OFDM systems
Şenol, Habib; Çırpan, Hakan Ali; Panayırcı, Erdal (Hindawi Publishing Corporation, 2006)Focusing on transmit diversity orthogonal frequency-division multiplexing (OFDM) transmission through frequency-selective channels this paper pursues a channel estimation approach in time domain for both space-frequency ... -
MAP channel-estimation-based PIC receiver for downlink MC-CDMA systems
Doğan, Hakan; Panayırcı, Erdal; Çırpan, Hakan Ali; Fleury, Bernard Henri (Hindawi Publishing Corporation, 2008)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 multicarrier (MC) code division multiple ... -
MIMO-OFDM Tabanlı Görünür Işıkla Haberleşme
Optik Kablosuz Haberleşme (Optical Wireless Communications (OWC)) sistemleri ve bunun olası bir uygulaması olan Görünür Işıkla Haberleşme (Visible Light Comunications (VLC)), uygulamalarda çok önemli teknik ve operasyonel ... -
A Mobile Channel Model for VLC and Application to Adaptive System Design
Miramirkhani, Farshad; Narmanlıoğlu, Ömer; Uysal, Murat; Panayırcı, Erdal (IEEE-INST Electrical Electronics Engineers Inc, 2017)In this letter we propose a realistic channel model for visible light communication (VLC) assuming a mobile user. Based on non-sequential ray tracing we first obtain channel impulse responses for each point over the user ... -
Modeling and Equalization of Indoor Visible Light Channnels
Mamus, Atilla; Yeşilkaya, Anıl; Panayırcı, Erdal (IEEE, 2016)In this paper a computationally efficient method is proposed for modeling the indoor visible light communications (VLC) channels using a non-sequential ray tracing technique. We created three dimensional realistic simulation ... -
Modeling of Visible Light Channels and Performance Analysis of ACO-OFDM
Yeşilkaya, Anıl; Alsan, Hüseyin Fuat; Miramirkhani, Farshad; Panayırcı, Erdal; Şenol, Habib; Uysal, Murat (IEEE, 2015)Spectrum scarcity of traditional radio communication has led communication engineers to find new alternatives. Indoor visible light communication is one alternative to solve this problem since its spectrum is not regulated ... -
Modeling of visible light channels and performance analysis of ACO-OFDM
Yesilkaya, A.; Alsan, H.F.; Miramirkhani, F.; Panayırcı, Erdal; Senol, H.; Uysal, M. (Institute of Electrical and Electronics Engineers Inc., 2015)Spectrum scarcity of traditional radio communication has led communication engineers to find new alternatives. Indoor visible light communication is one alternative to solve this problem since its spectrum is not regulated ... -
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 ... -
MP-SAGE Based Channel Estimation for Underwater Cooperative OFDM Systems
Erdoğan, Mustafa; Şenol, Habib; Panayırcı, Erdal; Uysal, Murat (IEEE, 2013)In this paper an efficient channel estimation algorithm is proposed for amplify-and-forward (AF) cooperative relay based orthogonal frequency division multiplexing (OFDM) system in the presence of sparse underwater acoustic ... -
A New Technique for OFDM: OFDM-Index Modulation
Basar, Ertuğrul; Aygölü, Ümit; Panayırcı, Erdal (IEEE, 2013)In this study a novel scheme called orthogonal frequency division multiplexing with index modulation (OFDMIM) is proposed for frequency selective channels. In this scheme the information is conveyed not only by only M -ary ... -
A new technique for OFDM: OFDM-index modulation
Basar, E.; Aygölü, Ü.; Panayırcı, Erdal (2013)In this study, a novel scheme called orthogonal frequency division multiplexing with index modulation (OFDMIM) is proposed for frequency selective channels. In this scheme, the information is conveyed not only by only M-Ary ... -
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 ... -
Next-Generation Multiple Access Based on NOMA With Power Level Modulation
Pei, Xinyue; Chen, Yingyang; Wen, Miaowen; Yu, Hua; Panayırcı, Erdal; Poor, H. Vincent (IEEE-Inst Electrical Electronics Engineers Inc, 2022)To cope with the explosive traffic growth expected in next-generation wireless networks, it is necessary to design next-generation multiple access techniques that can provide higher spectral efficiency as well as larger-scale ... -
Nondata-aided joint channel estimation and equalization for OFDM systems in very rapidly varying mobile channels
Şenol, Habib; Panayırcı, Erdal; Poor, H. Vincent (IEEE-INST Electrical Electronics Engineers Inc, 2012)This paper is concerned with the challenging and timely problem of joint channel estimation and equalization for orthogonal frequency division multiplexing (OFDM) systems in the presence of frequency selective and very ... -
Novel Channel Models For Visible Light Communications
Miramirkhani, Farshad; Uysal, Murat; Panayırcı, Erdal (Spie-Int Soc Optical Engineering, 2015)In this paper we investigate channel modeling for visible light communications (VLC) using non-sequential ray tracing simulation tools. We create three dimensional realistic simulation environments to depict indoor scenarios ... -
A Novel Transmit Array Structure for Optical Spatial Modulation
Çoğalan, Tezcan; Haas, Harald; Panayırcı, Erdal (IEEE, 2019)The performance of multiple input single output (MISO) and multiple input multiple output (MIMO) systems is limited by spatial channel correlation. This limitation becomes particularly severe in light lidelity (LiFi) ... -
On channel estimation for spatial modulated systems over time-varying channels
Acar, Yusuf; Doğan, Hakan; Panayırcı, Erdal (Academic Press Inc Elsevier Science, 2015)Spatial Modulation (SM) has been proposed recently for multiple-input multiple-output (MIMO) systems to cope with the interchannel interference and to reduce the detection complexity as compared to the conventional MIMO ... -
On Channel Estimation in DC Biased Optical OFDM Systems Over VLC Channels
Sayli, Osman; Dogan, Hakan; Panayırcı, Erdal (IEEE Computer Society, 2016)Visible Light Communication(VLC) has been considered as a potential access option for 5G wireless systems to solve performance limitation due to bandwidth shortage at radio frequency (RF) band. In (VLC) system illumination ... -
Optical Index-Coded Space Shift Keying (IC/SSK)
Panayırcı, Erdal (Institute of Electrical and Electronics Engineers Inc, 2021)In this letter, a new channel coding technique is proposed for optical spatial shift keying (SSK)-based visible light communications (VLC) systems by introducing redundancy in the spatial domain. The information is encoded ...