Experimental Studies in Carrier Frequency Offset Estimation for OFDM Systems PDF Download
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Author: Rajesh Ambati
Publisher:
ISBN:
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 106
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Book Description
Author: Rajesh Ambati
Publisher:
ISBN:
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 106
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Book Description
Author: Yufei Jiang
Publisher: Springer
ISBN: 3319249843
Category : Computers
Languages : en
Pages : 96
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Book Description
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: 戴尉任
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jie Zhu
Publisher:
ISBN:
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 246
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Author: Binwei Weng
Publisher:
ISBN:
Category :
Languages : en
Pages : 106
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Book Description
Author: Mahmoud Mohammad Qasaymeh
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 63
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Book Description
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: Santosh Gupta
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659235856
Category :
Languages : en
Pages : 72
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Book Description
The most important aspect in an OFDM is frequency and time synchronization as this form the reason for orthogonality between the subcarriers. However OFDM is susceptible to synchronization errors between transmitter and receiver local oscillator frequencies. This error is known as the carrier frequency offset (CFO) and causes ICI and also destroys the orthogonality between the subcarriers. In this literature we study the effects that CFO can cause to the SNR in an OFDM system, estimate the amount of frequency offset. Also the performance of the estimate is studied in a multipath environment. This book discusses and investigates the estimation of carrier offset frequency in orthogonal frequency division multiplexing (OFDM) mobile systems. Although OFDM is resistant to multipath fading, it requires a high degree of synchronization to maintain sub-carrier orthogonality. Therefore the level of performance of the system depends first on the accuracy in estimating the carrier frequency offset and then the estimation of the channel.
Author: Chia-Hua Chang
Publisher:
ISBN:
Category : Telecommunication
Languages : en
Pages : 55
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Book Description
Author: Xiangnian Zeng
Publisher:
ISBN:
Category :
Languages : en
Pages : 250
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Book Description
