Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/6535
標題: 適用於正交分頻多工無線區域網路之同步電路的實現
Realization of synchronization for OFDM-based wireless LAN system
作者: 許家禎
Hsu, Chia-Chen
關鍵字: OFDM;同步;synchronization;timing recovery;carrier recovery;時脈回復;正交;區域;網路;電路;載波回復
出版社: 電機工程學系
摘要: 
近幾年來,無線區域網路全世界性快速地發展著;而提供高速傳輸服務之無線通訊系統成為重要的研究之一。但是無線網路在空氣中遭受到不可預期的傳輸影響,比如說通道的衰減,這些影響將降低接受到訊號的品質。為了要處理這些問題,在接收端設計一個同步電路是必要的。
在本論文中將針對時脈回復和載波回復設計一個同步電路,為了處理無線通訊系統中載波回復問題,將提出一個創新的利用座標旋轉理論為基礎的弦波疊代震盪器。整個架構的實現與驗證會利用FPGA (Virtex2 XC2V1500)和ASIC的UMC 0.18um 1P6M CMOS製程,供應電壓為1.8伏特。在AWGN雜訊下,整個電路可以回復600KHz的頻率偏移。

In recent years, Wireless Local Area Network (WLAN) access has rapidly been deployed and worldwide extended. The development of wireless systems for high data-rate transmission has become one of important researches. But the wireless network suffers unpredictable transmission degradation in the air, such as channel fading. These effects will degrade the received signals. To deal with these problems, it is necessary to design a synchronization circuit in receiver.
In this thesis, the synchronization circuit for timing and CFO estimation is presented and the novel CORDIC-based Sinusoid Iteration Oscillator (CSIO) is proposed for CFO estimation in wireless communication. This architecture was implemented and verified using both FPGA with VirtexII XC2V1500 and ASIC with 0.18 μm 1P6M CMOS technology at a supply voltage of 1.8V. It recovers the 600 kHz frequency offset in an AWGN wireless system efficiently.
URI: http://hdl.handle.net/11455/6535
Appears in Collections:電機工程學系所

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