Synthetic Aperture Radar (SAR) system of high frequency, high resolution and high frame rate is one of the hot research areas. At present, the analysis of vibration error influence mainly embarks from the theoretical derivation, and simulated in level model. In order to accurately analyze the influence of high frequency vibration to high frequency SAR, it is necessary to simulate in signal level. Due to the short wave length of high frequency SAR, impact of high frequency vibration which is almost negligible to the conventional SAR of microwave band must be finely processed. Phase Adjustment by Contrast Enhancement (PACE) is a better SAR imaging autofocusing algorithm in the case of low Signal Noise Ratio (SNR), which can precisely estimate high frequency phase errors. In actual implementation, interpolation method is an effective means to improve the efficiency of the algorithm.

A novel and promising type of Synthetic Aperture Radar (SAR) concept for High Resolution and Wide Swath (HRWS) observation is presented. Different from conventional SAR systems, the proposed WYPSAR transmits a long pulse of Linear Frequency Modulation (LFM), but receives only partial signals of echoes, however, the focused image of the short received signals can be nearly the same length as the transmit pulse. And the rest time of the pulse interval can be used to receive echoes from other swaths. By WYPSAR, the HRWS observation is carried out much simpler than using the technology of multi-channel systems. After an introduction to the new concept, a simple example is presented. At last, the signal processing technique is discussed and a simulation result follows.

A multi-mode space-borne Synthetic Aperture Radar (SAR) simulator is presented in this paper. The simulator is based on the Space-borne Radar Advance Simulator (SBRAS), and supports the parameter design, raw data simulation, data focusing and performance evaluation of strip-map mode, spotlight mode, sliding spotlight mode, ScanSAR mode, Terrain Observation by Progressive Scans (TOPS) mode and mosaic mode. The hardware architecture and software composition are described below. At last, an application example of high resolution sliding spotlight with point targets and another application example of wide swath TOPS mode with distributed targets are provided.

Azimuth multi-channel synthetic aperture radar has been widely studied to realize high resolution wide swath imaging. Spectrum reconstruction algorithm deals with the main-lobe aliasing while the side-lobe spectrum still exists and is weighted by the reconstruction network as well. In the present paper, azimuth ambiguity of multi-channel strip SAR is investigated, an analytical expression of azimuth ambiguity to signal ratio is derived based on established linear model of the multi-channel signal in Doppler domain. The analysis will definitely benefit multi-channel system design.

In this paper, we consider bandwidth fusion to improve the range resolution. We propose a method based on spectral estimation and amplitude-phase error model to compensate for the lack of mutual coherent between radar subbands. Then we consider two-dimensional fusion to improve the range and cross-range resolution. A new algorithm, called EMEMP, is developed to resolve the poles mismatch occurred in traditional fusion method based on modified Root-Music. By simulations, good performance of these methods will be show.