可见光通信的OFDM调制性能研究

发布时间：2018-03-08 15:40

本文选题：正交频分复用　切入点：正交幅度调制　出处：《长春理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：本论文主要研究了QAM和π/4QPSK两种调制方式,并对VLC-OFDM调制解调系统在FPGA平台上进行了设计,提出了在System View4.5环境下将QAM调制方法应用于VLC-OFDM调制系统的仿真模型。通过添加复杂的信道编码和数据交织等模块,成功搭建了一个可见光通信OFDM (正交频分复用)调制解调仿真系统。最后使用BER曲线分析了此VLC-OFDM调制系统的性能。随着信道噪声功率有所下降,SNR增加,因而导致BER随之下降。论文分析了VLC-OFDM仿真系统在室内空间信道下的误码率特性曲线,得出了结论：所建立的VLC-OFDM调制模型不仅成功实现了其调制解调的功能,准确恢复出信息,并且它还具有一定的抗多径衰落能力。
[Abstract]:In this paper, we mainly study the QAM and 蟺 / 4QPSK modulation methods, and design the VLC-OFDM modulation and demodulation system on the FPGA platform. In this paper, the simulation model of QAM modulation method applied to VLC-OFDM modulation system under System View4.5 environment is proposed. By adding complex channel coding and data interleaving modules, A simulation system of OFDM (orthogonal Frequency Division Multiplexing) modulation and demodulation for visible light communication is successfully built. Finally, the performance of the VLC-OFDM modulation system is analyzed by using the BER curve. With the decrease of channel noise power and the increase of BER, the BER characteristic curve of VLC-OFDM simulation system in indoor space channel is analyzed in this paper. It is concluded that the proposed VLC-OFDM modulation model not only successfully realizes the function of modulation and demodulation, but also has the ability of resisting multipath fading.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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