Frequency Synchronization in OFDM System

• 作者: A. M. Vasumathi C. Geetha Priya
• 来源期刊: 信号与信息处理(英文)
• 学科: 工学
• 关键词: Orthogonal FREQUENCY Division MULTIPLEXING (OFDM) Additive White Gaussian Noise (AWGN) Carrier FREQUENCY OFFSET (CFO) Constant Amplitude Zero Auto Correlation (CAZAC) Zadoff-Chu (ZC)
• 年，卷（期）: 2013,（3）
• 页码范围: 138-143
• 页数: 6页
• 分类号: TN91

摘要

An accurate frequency synchronization method using the zadoff-chu (ZC) constant envelop preamble is analyzed, and a new preamble weighted by pseudo-noise sequence is used for orthogonal frequency division multiplexing (OFDM) systems. Using this method, frequency offset estimator range is greatly enlarged with no loss in accuracy. The range of the frequency estimation is ±30 of subcarrier spacing using ZC sequence as preamble. Simulations in the MATLAB for an AWGN channel show that the proposed method achieves superior performance to existing techniques in terms of frequency accuracy and range.