This paper introduces the Back-Projection(BP) algorithm to the stepped-frequency through-the-wall radar and proposes the time-minimization method to eliminate the wall s effects,such as refraction,changing in speed and attenuation.

In view of the problem that the resolution and penetrating depth of the SFGPR target images are limited by the system noise and underground medium loss, the MUSIC is proposed for signal processing of SFGPR to get the depth information of the targets.

The UWB (Ultra wide band) through-the-wall radar is a new techology of radar- exploration, which penetrates the wall and other opaque obstuctions by sending super broad band electromagnetic wave, can be used in detection, orientation and imaging of the targets.

The dissertation studied the through-the-wall radar system design and simulation, the main problems of the thesis studied as below: The dissertation introduced the ultra-wideband stepped-frequency signal and the imaging principle of high range resoulution, i.

The paper proposes a novel method of clutter cancellation for stepped-frequency radar.

A processing flow is proposed to suppress the severe clutter in high pulse repetition frequency(PRF) stepped-frequency radar.

Finally,to verify the results,the outfield experiments of two reflectors with symmetrical rotations are successfully designed and operated for the ground-based millimeter stepped-frequency radar.

The frequency stepped radar is widely applied in missile-borne guidance weapon and it has attracted great attention in the detection of motion target.

In the research of applying waveform entropy method to motion compensation of MMW frequency stepped radar, aiming at the local minimum problem of waveform entropy of frequency stepped signal, a frequency code Costas code is used and optimization is made in the definition of waveform entropy.