Patent ID: 11921152
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The method of claim 1 wherein the identification model further comprising:
a signal and its image signal input to heterodyne frequency sweep system can be identified by the timing order sequence of the output signals from the IF filter, the positive sign filter and negative sign filter;
if the timing order sequence of the output signals is such that the output signal from the negative sign filter appears first, then appears from that of the IF filter, and lastly appears that from the positive sign filter, then the signal frequency is lower than that of the frequency sweep local signal, the signal input to the heterodyne frequency sweep system is identified as the signal;
if the timing order sequence of the output signals is such that the output signal from the positive sign filter appears first, then appears that from the IF filter, and lastly appears that from the negative sign filter, then the signal frequency is higher than that of the frequency sweep local signal, the input to the heterodyne frequency sweep system is identified as an image signal.