Signal Transmission Method, Communication System, and Related Device

A signal transmission method, wherein the method is applied to a communication system, the communication system comprises a device and an optical-electro conversion module, and the method comprises:

• allocating, by the device or the optical-electro conversion module, a first compensation parameter to the optical-electro conversion module, wherein the first compensation parameter is less than a link parameter of a transmit link, the link parameter is used to compensate for an electrical signal transmitted over the transmit link, the transmit link comprises a first transmit link and a second transmit link, the device comprises a processing chip and a connector, the optical-electro conversion module comprises an electro-optical conversion chip, the first transmit link is from the connector to the electro-optical conversion chip, and the second transmit link is from the processing chip to the connector;
• compensating, by the device, for a first electrical signal based on a second compensation parameter, to obtain a compensated second electrical signal, wherein the second compensation parameter is less than the link parameter of the transmit link;
• sending, by the device, the second electrical signal to the optical-electro conversion module;
• compensating, by the optical-electro conversion module, for the second electrical signal based on the first compensation parameter, to obtain a compensated third electrical signal;
• and
• performing, by the optical-electro conversion module, electro-optical conversion on the third electrical signal to obtain an optical signal, and emitting, by the optical-electro conversion module, the optical signal.