摘要
基于正交频分复用-光载射频(OFDM-Ro F)技术原理,提出了一种OFDM-Ro F发射机的设计方案及关键技术的实现方法。采用现场可编程门阵列(FPGA)和AD9361设计了实时产生2.4GHz OFDM射频信号的硬件平台,并对OFDM信号进行离线处理。OFDM电信号解调后的星座图具有较好的收敛性,相应的误差矢量幅度(EVM)为3.575%。AD9361的高集成度、高灵活性简化了OFDM-Ro F发射端机的硬件设计,对于该技术的进一步商用化具有重要的意义。
By means of Orthogonal frequency division multiplexing radio over fiber （OFDM-RoF） technology, an OFDM-RoF transmitter has been proposed in order to generate the real-time OFDM signal. Based on Altera field programmable gate array （FPGA）, using the AD9361, the hardware platform has been built to ob- tain 2.4G Hz OFDM baseband. After signal process offiine, the constellation of demodulated OFDM signal has a good convergence, and the corresponding error vector magnitude （EVM） is 3.575%. With high integration and flexibility of the AD9361, the hardware design of the transmitter is significantly simplified, and it benefits greatly to the commercial application of OFDM-RoF technology.
出处
《光通信技术》
北大核心
2016年第11期5-8,共4页
Optical Communication Technology
