Multichannel Digitized RF-Over-Fiber Transmission Based on Bandpass Sampling and FPGA
Multichannel Digitized RF-Over-Fiber Transmission Based on Bandpass Sampling and FPGA
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DOI：
10.1109/tmtt.2010.2075450
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发表时间：
2010-10
影响因子：
4.3
通讯作者：
Yizhuo Yang;C. Lim;A. Nirmalathas
中科院分区：
文献类型：
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作者：
Yizhuo Yang;C. Lim;A. Nirmalathas
提出了一种多通道数字化射频光纤传输方案，并利用单模数转换器（ADC）和单数模转换器（DAC）实现频率转换。本文对该方案进行了全面的分析，并从信噪比、动态范围和性能随信道数增加而下降等方面与模拟链路进行了比较。我们使用市售现场可编程门阵列（FPGA）和ADC实验性地实现了多通道DRoF上行链路，其误差矢量幅度（EVM）小于1%。结果表明，DRoF链路中的干扰水平取决于重构信号的信道间隔。我们从理论和实验上证明，DRoF技术是足够的，以构建一个高性能的成本效益的RF光纤链路，特别是长距离的光纤无线电网络。
In this paper, we proposed multichannel digitized RF-over-fiber (DRoF) transmission scheme and realized frequency conversion using a single analog-to-digital converter (ADC) and a single digital-to-analog converter (DAC). We gave a comprehensively analysis on this scheme, and compared it with analog links in terms of signal-to-noise ratio (SNR), dynamic range and performance degradation with channel number increasing. We experimentally implemented a multichannel DRoF uplink using commercially-available field programmable gate array (FPGA) and ADC with satisfactory error-vector-magnitudes (EVM) of less than 1%. Results show that the interference level in DRoF link is dependent upon the channel spacing of the reconstructed signal. We theoretically and experimentally proved that the DRoF technique is sufficient to construct a high-performance cost-effective RF-over-fiber link, especially for long-haul fiber radio networks.