Signal processing method and related device

A signal processing method implemented by a radio access device comprising a radio frequency apparatus and a baseband processing apparatus, wherein the signal processing method comprises:

• receiving, by the radio frequency apparatus, a plurality of uplink radio frequency signals from a terminal device;
• receiving, by the radio frequency apparatus, an uplink frequency mixing signal from the baseband processing apparatus;
• performing, by the radio frequency apparatus, down-conversion frequency mixing on the uplink radio frequency signals and the uplink frequency mixing signal to obtain a plurality of first uplink analog signals;
• multiplexing, by the radio frequency apparatus, the first uplink analog signals into a second uplink analog signal;
• sending, by the radio frequency apparatus, the second uplink analog signal to the baseband processing apparatus;
• receiving, by the baseband processing apparatus, the second uplink analog signal sent by the radio frequency apparatus;
• converting, by the baseband processing apparatus, the second uplink analog signal into a first uplink digital signal;
• and
• demultiplexing, by the baseband processing apparatus, the first uplink digital signal, to obtain a plurality of second uplink digital signals.

A radio access device comprising:

• a baseband processing apparatus comprising:
• a baseband part configured to obtain a plurality of first downlink digital baseband signals;
• a multiplexing system coupled to the baseband part and configured to multiplex the first downlink digital baseband signals into a second downlink digital baseband signal;
• a frequency generator configured to generate a sampling clock signal;
• a digital-to-analog converter (DAC) coupled to the multiplexing system and configured to convert the second downlink digital baseband signal from the multiplexing system into a first downlink analog baseband signal;
• a combiner coupled to the frequency generator and the DAC and configured to combine the sampling clock signal with the first downlink analog baseband signal to obtain a combined sampling clock signal;
• and
• a first output interface configured to send the combined sampling clock signal, wherein the sampling dock signal enables generation of a first timing control signal for demultiplexing the first downlink analog baseband signal;
• and
• a radio frequency apparatus comprising:
• a second input interface configured to receive the combined sampling clock signal from the baseband processing apparatus;
• a demultiplexing multiplexer switch configured to demultiplex the first downlink analog baseband signal to obtain a plurality of second downlink analog baseband signals;
• and
• a radio frequency signal generation system coupled to the demultiplexing multiplexer switch and configured to generate, based on the second downlink analog baseband signals, a downlink radio frequency signal to be sent to a terminal device.

A radio access device comprising:

• a radio frequency apparatus comprising:
• an antenna configured to receive a plurality of uplink radio frequency signals from a terminal device;
• a second input interface configured to receive a sampling clock signal;
• a down-converter coupled to the antenna and configured to perform down-conversion on the uplink radio frequency signals to obtain a plurality of first uplink analog signals;
• an uplink multiplexing timing control system configured to generate a second timing control signal based on the sampling clock signal;
• and
• a multiplexing multiplexer switch coupled to the down-converter and configured to:
• multiplex the first uplink analog signals into a second uplink analog signal using the second timing control signal;
• and
• send the second uplink analog signal through a second output interface;
• and
• a baseband processing apparatus comprising:
• a first input interface configured to receive the second uplink analog signal from the multiplexing multiplexer switch;
• an analog-to-digital converter (ADC) coupled to the first input interface and configured to convert the second uplink analog signal into a first uplink digital signal;
• and
• a demultiplexing system coupled to the ADC and configured to demultiplex the first uplink digital signal to obtain a plurality of second uplink digital signals.