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正交频分复用(OFDM)的主要思想是将信道分成若干正交子信道,将高速数据信号转换成并行的低速子数据流,调制在每个子信道上进行传输,每个信道上的信号可以看成平坦性衰落,可以消除符号间干扰。因此,OFDM技术具有很强的抗多径能力和很高的频谱利用率。但是由于OFDM采用了正交的子载波,对同步误差极其敏感。主要研究了OFDM系统的符号定时同步算法,并对现有的算法进行仿真和优化,最终通过硬件调试实现了算法的功能。
The main idea of Orthogonal Frequency Division Multiplexing (OFDM) is to divide the channel into several orthogonal subchannels, convert the high speed data signals into parallel low speed sub data streams, modulate the transmission on each subchannel, and the signals on each channel Can be seen as a flat decline, you can eliminate intersymbol interference. Therefore, OFDM technology has strong anti-multipath capability and high spectral efficiency. However, since OFDM uses orthogonal subcarriers, it is extremely sensitive to synchronization errors. Mainly studied OFDM symbol timing synchronization algorithm, and the existing algorithms for simulation and optimization, and ultimately through the hardware debugging algorithm to achieve the function.