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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/69174

    Title: 線性階層頻率調變的發射與接收器實現;Transmitter and Receiver Implementation of Linear Step Frequency Modulation
    Authors: 陳頴樟;Chen,Ying-Chang
    Contributors: 光機電工程研究所
    Keywords: Chirp 信號;頻率調變;無線通訊;Chirp Signal;Frequency Modulation;Wireless Communication
    Date: 2015-07-24
    Issue Date: 2015-09-23 16:54:32 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文在介紹有關Chirp 線性調頻脈衝,因為線性調頻脈衝信號具有的各種優點,很適合無線的通訊環境,在有限的發送功率下,要送到更遠的地方,需要較大的頻寬, Chirp Signal 有良好的自相關特性,可以有效降低都普勒效應的影響,所以將線性調變(LFM)實現在硬體上,並與二位元頻率偏移調變(BFSK)的效能做分析與探討。此外,在平台使用了FPGA 實驗版上做硬體模擬實現,傳送頻帶為2MHz 2MHz ,取樣頻率8MHz ,為了降低實現的複雜度,所以本文也會提到如何將線性頻率調變設計成線性階層頻率調變(LSFM),對這兩種調變的成本與效能做詳細的分析與比較,最後介紹解調的原理以及硬體實現的架構, 以加入AWGN 的干擾下,呈現的解調性能做分析。;This thesis presents the chirp communications. Because chirp signal has var-ious merits which are suitable for wireless communications environment.It can be transmitted at a greater distance without the need to increase the power of trans-mitter.Whether it uses the bandwidth much greater than the bandwidth of the data.For the Doppler shift, chirp signal has the merit to combat Doppler shift because of the characteristic of its good auto correlation function. We achieved the LFM on the hardware, and compared the e cacy with BFSK. Otherwise, we used the FPGA to simulate the hardware. The transmission bandwidth is 2MHz 2MHz, and the sampling frequency is 8MHz. This thesis will show that how to transform the LFM into the LSFM, because of reducing the complexity. Compared with these two modulation ways for their e cacy. At last, we will introduce the principle and the hardware diagram. Analysis the modulation e cacy with AWGN.
    Appears in Collections:[光機電工程研究所 ] 博碩士論文

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