Digital fronthaul data transmission method, device, and system

A digital fronthaul data receiving method, comprising:

• receiving, by a second microwave device, a microwave air interface frame from a microwave air interface;
• obtaining, by the second microwave device, a microwave overhead, radio signal information, and in-phase/quadrature (I/Q) data of common information that are in the microwave air interface frame, wherein the radio signal information and the I/Q data of the common information are encapsulated in a payload area of the microwave air interface frame, and a pilot in the microwave overhead and the payload area are arranged at a preset interval in an interleaved manner;
• performing, by the second microwave device, channel damage estimation according to the pilot;
• performing channel damage compensation for the radio signal information and the I/Q data of the common information;
• performing, by the second microwave device, digital demodulation on the I/Q data of the common information that is obtained after channel damage compensation, to generate the common information;
• recombining, by the second microwave device, the common information and the radio signal information that is obtained after channel damage compensation, to generate digital fronthaul data;
• and
• sending the digital fronthaul data.

A first microwave device, comprising:

• a receiver, configured to receive digital fronthaul data;
• a processor, configured to:
• obtain common information and radio signal information from the digital fronthaul data received by the receiver,
• perform digital quadrature amplitude modulation (QAM) on the common information to obtain in-phase/quadrature (I/Q) data of the common information, and
• generate a microwave air interface frame in a time division multiplexing manner based on the radio signal information and the I/Q data of the common information, wherein the radio signal information and the I/Q data of the common information are encapsulated in a payload area of the microwave air interface frame, and a pilot in a microwave overhead and the payload area are arranged at a preset interval in an interleaved manner;
• and
• a transmitter, configured to send the microwave air interface frame obtained by the processor.

A second microwave device, comprising:

• a receiver, configured to receive a microwave air interface frame from a microwave air interface;
• a processor, configured to:
• obtain a microwave overhead, radio signal information, and in-phase/quadrature (I/Q) data of common information that are in the microwave air interface frame, wherein the radio signal information and the I/Q data of the common information are encapsulated in a payload area of the microwave air interface frame, and a pilot in the microwave overhead and the payload area are arranged at a preset interval in an interleaved manner,
• perform channel damage estimation according to the pilot,
• perform channel damage compensation for the radio signal information and the I/Q data of the common information,
• perform digital demodulation on the I/Q data of the common information that is obtained after channel damage compensation, to generate the common information, and
• recombine the common information and the radio signal information that is obtained after channel damage compensation, to generate digital fronthaul data;
• and
• a transmitter, configured to send the digital fronthaul data obtained by the processor.