Signal Folding Method and Device

A signal folding device, comprising:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions to:
• receive an input signal;
• perform, based on the input signal, frequency modulation on a first plurality of first analog signals to obtain a second plurality of modulated first analog signals, wherein a frequency difference between two adjacent modulated first analog signals is the same;
• filter, based on a bandwidth, the second plurality to obtain a second analog signal, wherein the second analog signal is within the bandwidth, and wherein the bandwidth corresponds to the frequency difference;
• and
• demodulate the second analog signal to obtain an output signal,
• wherein the output signal is a folded signal of the input signal within a target amplitude, and
• wherein the target amplitude corresponds to the bandwidth.

A computer program product comprising instructions stored on a non-transitory computer-readable medium that, when executed by a processor, cause an electronic device to:

• receive an input signal;
• perform, based on the input signal, frequency modulation on a first plurality of first analog signals to obtain a second plurality of modulated first analog signals, wherein a frequency difference between two adjacent modulated first analog signals is the same;
• filter, based on a bandwidth, the second plurality to obtain a second analog signal, wherein the second analog signal is within the bandwidth, and wherein the bandwidth corresponds to the frequency difference;
• and
• demodulate the second analog signal to obtain an output signal,
• wherein the output signal is a folded signal of the input signal within a target amplitude, and
• wherein the target amplitude corresponds to the bandwidth.