Secondly,it got the effect which came from the trajectory deviations by analyses of the frequency,it was that when the plane fly alone the sine trajectory,the main lobe peak of SAR image depresses with the paired echo generating.

Based on uniformity weighting antenna, the location and amplitude of the paired echo resulting from instability of antenna pointing are derived in detail.

The reasons of the paired false target echoes are analyzed and the paired echoes are divided into two types,one is called "undersampled type" and anather,"velocity mismatched type".

Synthetic aperture radar raw signal generation and image simulation of typical targets

On the base of pollen microscope examination of the sterile line and the maintenance line, selection of single plant, then pairing backcrossing between the maintenance lines and the sterile lines selected, line identification, blending lines propagating.

For the building penetrating detection technology,strong echo counteraction is a key issue.

Acoustic Echo Cancellation and Blind Speech Signal Separation along with the DSP Implementation;

Research and DSP Implementation of Decorrelating NLMS with Variable Step Size Algorithm for Acoustic Echo Cancellation;

Polynomial function and hard-clipping function are adopted to simulate the nonlinearity of the loudspeaker system, and the introduction of corresponding nonlinear pre-processing into the Normalized Least-Mean-Square (NLMS) algorithm of acoustic echo cancellation is proposed, thus to improve the effects of the acoustic echo cancellation.