Noise addition electronic warfare apparatus and method for deception frequency based on frequency domain

An electronic warfare apparatus comprising:

• a Doppler generator configured to change an input frequency of a transmission signal of a radar and output a first deception signal having a deception frequency;
• a noise processing unit configured to mix noise with the first deception signal having the deception frequency and then control a signal intensity of the noise to a signal intensity capable of masking a reflection signal received from a radar, and output a noise signal;
• a deception signal processing unit configured to control a signal intensity of the first deception signal to a signal intensity greater than a signal intensity of the noise signal and output a second deception signal;
• and
• a combiner configured to combine the noise signal and the second deception signal and output a noise mixture deception signal,
• the Doppler generator includes
• a phase control waveform generator configured to perform a phase change at a phase control interval from a phase of 0 [deg] to 360 [deg] on the input frequency for a time corresponding to a reciprocal of the phase control frequency and generate the phase control frequency;
• and
• a digital phase shifter configured to add the phase control frequency to the input frequency and generate the deception frequency.

A noise addition method for a deception frequency, the noise addition method comprising:

• changing an input frequency of a transmission signal of a radar and outputting a deception signal having the deception frequency;
• distributing the deception signal to a first path and a second path;
• mixing noise with the deception signal in the first path and then controlling a signal intensity of the noise, and outputting a noise signal;
• controlling a signal intensity of the deception signal in the second path and outputting the deception signal;
• and
• combining a noise signal output in the first path and the deception signal output in the second path and outputting a noise mixture deception signal,
• the outputting of the deception signal includes
• performing a phase change at a phase control interval from a phase of 0 [deg] to 360 [deg] on the input frequency for a time corresponding to a reciprocal of the phase control frequency and generating the phase control frequency;
• and
• adding the phase control frequency to the input frequency and generating the deception frequency.

A noise addition method for a deception frequency, the noise addition method comprising:

• changing an input frequency of a transmission signal of a radar and outputting a first deception signal having the deception frequency;
• mixing noise with the first deception signal having the deception frequency and then control a signal intensity of the noise to a signal intensity capable of masking a reflection signal received from a radar, and outputting a noise signal;
• controlling a signal intensity of the first deception signal to a signal intensity greater than a signal intensity of the noise signal and outputting a second deception signal;
• and
• combining the noise signal and the second deception signal and outputting a noise mixture deception signal,
• the outputting of the first deception signal includes
• performing a phase change at a phase control interval from a phase of 0 [deg] to 360 [deg] on the input frequency for a time corresponding to a reciprocal of the phase control frequency and generating the phase control frequency;
• and
• adding the phase control frequency to the input frequency and generating the deception frequency.