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Student Number 975203052 Author Sheng-Chung Kuo(郭勝中) Author's Email Address No Public. Statistics This thesis had been viewed 528 times. Download 186 times. Department Communication Engineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language English Title Carrier Frequency Offset Estimation for OFDMA Uplink Date of Defense 2010-07-08 Page Count 36 Keyword CFO Iterative Scheme MUSIC OFDMA Abstract In OFDMA uplink systems, carrier frequency offset (CFO) would cause inter carrier interference (ICI) and multiple access interference (MAI), and would degrade the system performance. Blind CFO estimation algorithms have been proposed in lot of papers, and [1] proposed the MUSIC algorithm with excellent performance, but the MUSIC algorithm includes two operation that are hard for hardware to implement, to acquire the noise subspace and grid search procedure that depends on search resolution, besides, the wireless communication system transmission unit is frame, but the channel and CFO will change along the symbols, so if we estimate the CFO per symbol isn’t efficiency, so in this paper, we applied a fast data projection method (FDPM) to get the noise subspace and proposed a iterative MUSIC scheme to estimate the CFO over frame rapidly. Table of Content 論文摘要I

AbstractII

致謝III

ContentsIV

List of TablesVI

Chapter 1 Introduction1

Chapter 2 System Model6

2.1 Interleaved Subcarrier Assignment Scheme6

2.2 Transmitter7

2.3 Wireless Channel9

2.4 Receiver10

Chapter 312

BLIND CFO ESTIMATION ALGORITHM12

3.1 Blind Parameter Estimation by MUSIC12

3.2 Subspace Tracking Algorithm14

3.3 Iterative Method17

3.4 Proposed Iterative Estimation Scheme19

3.5 Analysis23

Chapter 4 Simulation Results25

4.1 Simulation Models for OFDMA Uplink25

4.2 Simulation Results28

Chapter 5 Conclusions32

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975203052.pdf Date of Submission 2010-07-22

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