Yazar "Çırpan, Hakan Ali" için listeleme
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Adaptive Kalman receiver for OFDM systems with transmit diversity in mobile wireless channels
Şen, Adnan; Çırpan, Hakan Ali; Panayırcı, Erdal (Walter De Gruyter GMBH, 2004-12)A new joint channel tracking and symbol detection scheme is proposed in this paper for pilot symbol assisted transmit diversity OFDM systems by exploiting the correlation of the adjacent subchannels. Modelling the channel ... -
Blind channel estimation for space-time coding systems with Baum-Welch algorithm
Çırpan, Hakan Ali; Panayırcı, Erdal (IEEE, 2002)In recent years, space-time coding is proposed to provide significant capacity gains over the traditional communication systems in fading wireless channels. In this paper, we consider the problem of blind estimation of the ... -
Channel estimation for space-time block coded OFDM systems in the presence of multipath fading
Panayırcı, Erdal; Çırpan, Hakan Ali (IEEE, 2002)In this paper, a computationally efficient, non-data-aided maximum a posterlori(MAP) channel estimation algorithm is proposed for orthogonal frequency division multiplexing (OFDM) systems with transmitter diversity using ... -
Cluster based sensor scheduling in a target tracking application with particle filtering
Özfidan, Özgür; Bayazıt, Uluğ; Çırpan, Hakan Ali (IEEE, 2007)In multi-sensor applications management of sensors is necessary for the classification of data they produce and for the efficient use of sensors as well. One of the important aspects in sensor management is the sensor ... -
Cyclostationarity based blind block timing estimation for alamouti coded MIMO signals
Öner, Mustafa Mengüç; Gül, Serhat; Çırpan, Hakan Ali (IEEE, 2017-06)Blind parameter estimation algorithms provide a powerful tool for application scenarios where the use of training or pilot sequences is not desirable, e.g., in order to improve the bandwidth efficiency of the transmission, ... -
Eurasip journal on wireless commuication and networking: Editorial
Panayırcı, Erdal; Georghiades, Costas N.; Wang, Xinheng; Çırpan, Hakan Ali (Springer International Publishing, 2005-04-15)[No abstract available] -
Frequency selective fading channel estimation in OFDM systems using KL expansion
Şenol, Habib; Çırpan, Hakan Ali; Panayırcı, Erdal (IEEE, 2005)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 ... -
Iterative channel estimation approach for space-time/frequency coded OFDM systems with transmitter diversity
Çırpan, Hakan Ali; Panayırcı, Erdal; Doğan, Hakan (Assoc Elettrotecnica Ed Elettronica Italiana, 2004-06)Focusing on transmit diversity orthogonal frequency division multiplexing (OFDM) transmission through frequency selective channels, this paper pursues novel iterative channel estimation approaches for both space-frequency ... -
Joint channel tracking and symbol detection for OFDM systems with Kalman filtering
Şen, Adnan; Çırpan, Hakan Ali; Panayırcı, Erdal (Urban & Fischer Verlag, 2003)This paper proposes a new joint channel tracking and symbol detection scheme for pilot symbol-assisted OFDM systems in multipath fading. The proposed scheme uses Kalman filters for both channel tracking and subsequent ... -
Joint modulation classification and antenna number detection for MIMO systems
Öner, Mustafa Mengüç; Turan, Merve; Çırpan, Hakan Ali (IEEE, 2016-01-07)Noncooperative classification of the modulation type of communication signals finds application in both civilian and military contexts. Existing modulation classification methods for multiple-input multiple-output (MIMO) ... -
Jointly optimal chunk and power allocation in uplink SC-FDMA
Mert, Teoman; Kaya, Onur; Çırpan, Hakan Ali (IEEE, 2013)For a single carrier frequency division multiple access (SC-FDMA) system, we obtain the jointly optimal power and chunk allocation policies which maximize the sum rate. Our solution is applicable to both localized and ... -
Linear expansions for frequency selective channels in OFDM
Şenol, Habib; Çırpan, Hakan Ali; Panayırcı, Erdal (Elsevier GMBH, 2006)Modeling the frequency selective fading channels as random processes, we employ a linear expansion based on the Karhumen-Loeve (KL) series representation involving a complete set of orthogonal deterministic vectors with a ... -
A low-complexity KL expansion-based channel estimator for OFDM systems
Şenol, Habib; Çırpan, Hakan Ali; Panayırcı, Erdal (Springer International Publishing, 2005-04-05)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 ... -
Maximum a posteriori multipath fading channel estimation for OFDM systems
Panayırcı, Erdal; Çırpan, Hakan Ali (Assoc Elettrotecnica Ed Elettronica Italiana, 2002-10)In this paper, a non-data-aided maximum a posteriori (MAP) channel estimation technique for OFDM systems employing M-PSK modulation scheme is proposed. The technique requires a convenient representation of the discrete ... -
Maximum likelihood blind channel estimation for space-time coding systems
Çırpan, Hakan Ali; Panayırcı, Erdal; Çekli, Erdinç (Hindawi Publishing Corporation, 2002-05)Sophisticated signal processing techniques have to be developed for capacity enhancement of future wireless communication systems, In recent years, space-time coding is proposed to provide significant capacity gains over ... -
MIMO sinyalleri için uzay-zaman blok kodu klasifikasyonu
Öner, Mustafa Mengüç; Turan, Merve; Çırpan, Hakan Ali (IEEE, 2014-04-26)Bilinmeyen haberleşme sinyallerinin gözü kapalı ve işbirliksiz tanınması için geliştirilen teknikler, hem askeri hem de sivil uygulamalarda kullanım bulmuştur. Çok Girdili Çok Çıktılı (MIMO) haberleşme sistemleri, sinyal ... -
Non-data aided EM-Based channel estimation for OFDM systems with time-varying fading channels
Panayırcı, Erdal; Çırpan, Hakan Ali (Kluwer Academic Publishers, 2002)In this paper, a computationally efficient algorithm is presented for maximum a posteriori (MAP) channel estimation for OFDM systems employing M-PSK modulation scheme with additive Gaussian noise, based on the Expectation ... -
Parçacık süzgeçleme ile hedef izleme uygulamasında topak çizelgeleme
Özfidan, Özgür; Bayazıt, Uluğ; Çırpan, Hakan Ali (IEEE, 2007)Bu çalışmada, uzaklık ölçer algılayıcılarla hedef takibi uygulamasında algılayıcı çizelgeleme problemi ele alınmıştır. Çok algılayıcılı uygulamalarda algılayıcıların yönetimi ürettikleri verilerin sınıflandırılması için ... -
Pilot-aided bayesian MMSE channel estimation for OFDM systems: Algorithm and performance analysis
Şenol, Habib; Çırpan, Hakan Ali; Panayırcı, Erdal (IEEE, 2004)This paper proposes a computationally efficient, pilot-aided minimum mean square error (MMSE) channel estimation algorithm for OFDM systems. The proposed approach employs a convenient representation of the discrete multipath ... -
A sequential Monte Carlo method for blind phase noise estimation and data detection
Panayırcı, Erdal; Çırpan, Hakan Ali; Moeneclaey, Marc (IEEE, 2005)In this paper, a computationally efficient algorithm is presented for blind phase noise estimation and data detection jointly, based on a sequential Monte Carlo method. The basic idea is to treat the transmitted symbols ...