Frequency point signal transmission method and system

The invention relates to the technical field of optical fiber communication, in particular to a frequency point signal transmission method and system, and the method comprises the steps: obtaining an analog signal of a preset frequency, and modulating the analog signal to obtain target data; performing coherent demodulation mapping on the target data to output first data; and inputting the first data into a filter of a receiving end, and filtering the first data to obtain a target signal waveform. According to the invention, the DSM modulation technology is applied to the signal generation transmitting end, and the required single-frequency-point signal is generated and transmitted by using the digital signal, so that the whole relay-free transmission system architecture is simplified, and the system structure complexity is reduced. And meanwhile, variable-rate communication transmission is realized. 本申请涉及光纤通信技术领域，尤其涉及一种频点信号传输方法及系统，所述方法包括：获取预设频率的模拟信号，并将所述模拟信号进行调制以得到目标数据；将所述目标数据进行相干解调映射，以输出第一数据；将所述第一数据输入至接收端的滤