Bayesian Carrier Frequency Offset Estimation in Orthogonal Frequency Division Multiplexing Systems PDF Download
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Author: Kun Cai (M. Phil.)
Publisher:
ISBN:
Category : Bayesian statistical decision theory
Languages : en
Pages : 49
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Book Description
Author: Kun Cai (M. Phil.)
Publisher:
ISBN:
Category : Bayesian statistical decision theory
Languages : en
Pages : 49
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Yufei Jiang
Publisher: Springer
ISBN: 3319249843
Category : Computers
Languages : en
Pages : 96
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This SpringerBrief investigates the performance of semi-blind independent component analysis (ICA) based equalization and carrier frequency offset estimation approaches (CFO) for a number of orthogonal frequency division multiplexing (OFDM) based wireless communication systems. It provides a comprehensive overview of the challenges of channel equalization and frequency synchronization for different wireless systems. The authors present the wireless communication channel and system models. Key existing CFO estimation methods are reviewed, along with a number of the training based and non-training based (blind) channel estimation methods. This is followed by a study of ICA and its applications to OFDM-based wireless communication systems. Later chapters provide a detailed description of recent research on semi-blind CFO estimation and ICA based equalization approaches for various wireless communication systems including multiple-input multiple-output (MIMO) OFDM and coordinated multipoint (CoMP) systems. Semi-blind CFO estimation and equalization structures provide a spectrum-efficient and high-performance solution for high speed wireless communications. This book is suitable for postgraduate students, researchers or professionals in the area of wireless communications.
Author: Nagaravind Challakere
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Xiangnian Zeng
Publisher:
ISBN:
Category :
Languages : en
Pages : 250
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Author: Bulent Karaoglu
Publisher:
ISBN: 9781423586876
Category :
Languages : en
Pages : 65
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OFDM is a modulation technique that achieves high data rates, increased bandwidth efficiency and robustness in multipath environments. However, OFDM has some disadvantages, such as sensitivity to channel fading, large peak to average ratio and sensitivity to frequency offset. The latter causes intercarrier interference (ICI) and a reduction in the amplitude of the desired subcarrier which results in loss of orthogonality. In this thesis, the effects of frequency offset are studied in terms of loss of orthogonality. A number of techniques for frequency offset estimation are presented and tested in computer simulations.
Author: Mahmoud Mohammad Qasaymeh
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 63
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A Multicarrier Communication (MCM) system such as an Orthogonal Frequency Division Multiplexing OFDM or Discrete Multi Tone (DMT) system has been shown to be an effective technique to combat multipath fading in wireless communications. OFDM is a modulation scheme that allows digital data to be efficiently and reliably transmitted over a radio channel, even in multipath environments. OFDM transmits data by using a large number of narrow bandwidth carriers. These carriers are regularly spaced in frequency, forming a block of spectrum. The frequency spacing and time synchronization of the carriers is chosen in such a way that the carriers are orthogonal, meaning that they do not cause interference to each other. In spite of the success and effectiveness of the OFDM systems, it suffers from two well known draw backs: large Peak to Average Power Ratio (PAPR) and high sensitivity to Carrier Frequency Offset (CFO). The presence of the CFO in the received carrier will lose orthogonality among the carriers and because the CFO causes a reduction of desired signal amplitude in the output decision variable and introduces Inter Carrier Interference (ICI). It then brings up an increase of Bit Error Rate (BER). This makes the problem of estimating the CFO an attractive and necessary research problem. In this dissertation blind estimation techniques will be proposed to estimate the offset parameter.
Author: Rajesh Ambati
Publisher:
ISBN:
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 106
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Author: Jie Zhu
Publisher:
ISBN:
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 246
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Author:
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ISBN:
Category :
Languages : en
Pages : 0
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