Signal processing method and apparatus

An apparatus, comprising:

• at least one memory configured to store instructions;
• and
• at least one processor coupled to the at least one memory, wherein the instructions are for execution by the at least one processor to cause the apparatus to:
• transmit radar signals of a plurality of subbands including a first subband and a second subband adjacent to the first subband;
• obtain a first range time-domain signal of the first subband and a second range time-domain signal of the second subband;
• synthesize and superposing the first range time-domain signal and the second range time-domain signal to obtain a third range time-domain signal;
• obtain a first peak point and a second peak point of the third range time-domain signal, wherein the first peak point is a peak point corresponding to a main lobe of the third range time-domain signal, the second peak point is a peak point corresponding to a first side lobe adjacent to a main peak of the third range time-domain signal, and the peak point corresponding to the first side lobe is higher than a peak point corresponding to a second side lobe adjacent to the main peak of the third range time-domain signal;
• determine a constant phase error θerr between the first range time-domain signal and the second range time-domain signal based on the first peak point and the second peak point, wherein θerr∈[0,2π];
• and
• obtain a radar imaging map based on the first range time-domain signal, the second range time-domain signal, and the constant phase error θerr.

A non-transitory computer-readable storage media comprising instructions which, when executed by one or more processors of a radar, cause the one or more processors to perform operations comprising:

• transmitting radar signals of a plurality of subbands including a first subband and a second subband adjacent to the first subband;
• obtaining a first range time-domain signal of the first subband and a second range time-domain signal of the second subband;
• synthesizing and superposing the first range time-domain signal and the second range time-domain signal to obtain a third range time-domain signal;
• obtaining a first peak point and a second peak point of the third range time-domain signal, wherein the first peak point is a peak point corresponding to a main lobe of the third range time-domain signal, the second peak point is a peak point corresponding to a first side lobe adjacent to a main peak of the third range time-domain signal, and the peak point corresponding to the first side lobe is higher than a peak point corresponding to a second side lobe adjacent to the main peak of the third range time-domain signal;
• determining a constant phase error θerr between the first range time-domain signal and the second range time-domain signal based on the first peak point and the second peak point, wherein θerr∈[0,2π];
• and
• obtaining a radar imaging map based on the first range time-domain signal, the second range time-domain signal, and the constant phase error θerr.