基于光子射频波高次倍频的深度融合通信研究

文中提出了基于光子射频高次倍频的微波与光纤深度融合的通信系统架构，从理论上论证了在已调制光信号中只存在奇数光谱边带所携带的调制信息，而偶数光谱边带不包含调制信息，并且在输出光谱边带中不存在二阶光谱边带. 在已调光信号传输到基站后，用中心光谱边带作为下行数据信号传输链路的激光光源，用分离出的低的第四阶光谱边带作为上行基带传输链路的激光光源，用高的和低的第三阶光谱边带拍频产生光子射频波. 通过专业仿真套件对25 km标准单模光纤传输的信号进行了模拟测试，分别得到下行光纤链路信号和上行光纤链路信号的清晰眼图和良好的误码率. 在该系统网络架构中，基站侧没有激光光源，其复杂度降低；利用光子射频波高次倍频直接产生毫米波，极大简化了射频处理单元.

Research on Deeply Converged Communication System Based on Photonic-RF Wave via High Order Frequency-Beating

A novel architecture of communication system is proposed based on a deep integration of wireless and optical fiber system using high-frequency microwave generated by the photonic radio-frequency (RF) processing. It is theoretically demonstrated that only the odd spectral side-bands carry the modulation information, but the even ones do not, and that there is no second order spectral side-band in the output of the spectral side-bands. After the modulated optical signals are transmitted to the base station (BS), the central spectral side-band is used as the laser source of the downlink transmission, the lower one of the fourth spectral side-bands is used as the laser source of the uplink transmission, and the photonic RF wave is generated by the frequency-beating between the upper one and lower one of the third spectral side-bands. The clear eye-diagram and the low bit error rate (BER) are obtained respectively via the professional simulation software under the condition that the signals are transmitted over the standard single mode fiber (SSMF) with 25 km. In the system architecture, there is no laser source in the BS, so the complexity of the BS is reduced greatly. Moreover, owing to the high-frequency microwave produced by photonic-RF wave directly via high order frequency-beating, the RF processing unit is enormously simplified.