Chang Yuliang

Band Characteristics of SINR Polarization Filter

The band characteristics of the signal-to-interference-and-noise-ratio polarization filter to one signal in the presence of single noncoherent, purely polarized interference are investigated. The formulae of the filter band width on the polarization tracks and in the whole polarization region are presented. The quantitative description and the characteristic curves of the band scale are also given

New target detection method in strong active jamming background for polarimetric radar

A new method of target detection for polarimetric radar in the presence of strong active jamming is proposed. Based on analysis of the polarization characterizations of the signals received by polarimetric radar, the target detection is achieved through testing on the polarization information. Comparing with the traditional method of target detection made in time-frequency domain, the detection performance of the new method is improved because the influence of the strong active jamming is avoided. The performance of the new method is analyzed by simulation. Its validity is verified through outdoor experiment carried out by X-band polarimetric radar.

A new far field measurement method for antenna polarization characteristics based on calibrator target

A new far-field measurement method of antenna is studied in this paper. The received signal model of antennas beam scanning the calibrator target has been built and the measurement method is considered. The full analysis formula and practical procedure was given. The validity of research work was demonstrated by processing the observational data and simulation. This can greatly reduce the development complexity and production cost of far field test, increased the fidelity at the meanwhile.

Simultaneous estimation of AOA and polarization using differently polarized antennas

This paper explores the simultaneous estimation method of the AOA and the polarization of the signals. Based on two differently polarized antennas, the simultaneous estimation is achieved with consideration of the cross-polar and co-polar patterns of the antennas. The performance of the method is analyzed. The validity is testified by the experiment of P-band radar system.

A unique calibration method testified by X-band polarimetric radar

This paper explores a unique calibration method for polarimetric radar without requiring any calibration targets. The error of the polarimetric scattering matrix measurement is modeled as antenna distortion matrices and channel distortion matrices. These distortion matrices can be determined using a signal generator in anechoic chamber. The performance of the calibration method is analyzed by simulation. Its validity is verified through the experiment of an X-band polarimetric radar system.