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理论提出了一种获得高倍频因子的毫米波产生方案并对产生毫米波的Ro F下行链路性能进行分析。方案中利用三角波替代正弦波来驱动双驱动马赫增德尔调制器。通过三角波扫频,可以产生更多的频率分量。均匀光纤布拉格光栅可以选择出所需的频率分量进行拍频产生毫米波信号。倍频因子的调谐可以通过调节两个均匀光纤布拉格光栅的中心波长来实现。方案可获得倍频因子分别为4,6,8,10,12 mm的波信号,并对各种倍频因子下的Ro F下行链路性能进行了分析。结果表明,在各种倍频因子下,经过10 km光纤的传输,解调后眼图均能保持一定的张开度,满足通信需求。该方案为未来的无线电通信系统提供了一定的支持。
The theory proposes a millimeter-wave generation scheme for obtaining high frequency multipliers and analyzes Ro F downlink performance for millimeter-wave generation. The scheme uses triangular wave to replace sine wave to drive dual-drive Mach-Zehnder modulator. By triangular wave sweep, can produce more frequency components. A uniform fiber Bragg grating can be selected to produce the required frequency components for beat frequency millimeter-wave signals. Multiplication factor tuning can be achieved by adjusting the center wavelength of two uniform fiber Bragg gratings. The scheme can obtain wave signals with frequency multiplication factors of 4, 6, 8, 10, and 12 mm, respectively, and analyzes Ro F downlink performance under various frequency multipliers. The results show that under various multiplication factors, after the transmission of 10 km optical fiber, the eye diagram can maintain a certain degree of opening after demodulation to meet the communication requirements. The program provides some support for future radiocommunication systems.