無線正交分頻多工通訊系統中運用啁啾信號之時間與頻率偏移估測; Joint Time and Frequency Offset Estimation Assisted from Chirp Signal forWireless OFDM Communications

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/8216

Title:	無線正交分頻多工通訊系統中運用啁啾信號之時間與頻率偏移估測;Joint Time and Frequency Offset Estimation Assisted from Chirp Signal forWireless OFDM Communications
Authors:	林育志;Ｙｕ-chih Lin
Contributors:	通訊工程研究所
Keywords:	啁啾信號;時間與頻率偏移估測;同步;synchronization;chirp signal;estimation
Date:	2008-07-03
Issue Date:	2009-09-22 11:21:16 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本論文提出一種適用於無線通訊系統的時間與頻率偏移估測技術，利用雙啁啾信號可有效地估測時間與頻率誤差。此方法可應用於各種通訊環境之同步。我們提出時域與頻域兩種接收器，並比較兩者的效能與準確度。其中一接收器使用兩個時域相關器，藉著估測時間峰值進行線性組合運算以估測時間與頻率。另一則使用一組成對的頻域相關器，藉著估測頻率峰值進行線性轉換以估測時間與頻率。最後以正交分頻多工系統之參數進行模擬，結果證明其可有效地達成同步。 This paper describes two novel structures for reception of dual-chirp waveforms. The approaches provide mechanisms for synchronization in various communications environments. Both detection performance, and time and frequency estimation accuracy are analyzed and simulated. One receiver utilizes a dual time-domain correlator to initially estimate two peak times after detection. Time and frequency estimates are obtained by linearly combining the peak time estimates. The second receiver uses paired frequency-domain correlators to initially estimate two peak frequencies and then linearly convert them to the time and frequency estimates.
Appears in Collections:	[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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