The possibility of isolated target 3-D position estimation and optimal receiver position determination in SS-BSAR

Abstract

Starting from the generalized ambiguity function of bistatic SAR (BSAR), it is shown that 3-D point target estimation can be carried out in space-surface bistatic SAR (SS-BSAR). Appropriate analytical equations, based on maximum likelihood estimation (MLE), are derived and confirmed via computer simulation. Furthermore, the performance of the estimate using the Crammer-Rao bound is analyzed for the case in question, thus further revealing the possibility and potential of target 3-D position estimation. Setting the determinant maximum of the information matrix as the criterion, the optimal receiver position and multi-receiver configuration are analytically determined in the SS-BSAR system. Simulation results also validate the correctness of the analytical calculation.

Physical modeling and spectrum spread analysis of surface clutter in forward scattering radar

“…According to eqs. (10)- (15) and Table 2, the signal bandwidth of single EP is approximately equal to 2f im for all three carrier frequencies and nearly independent of the carrier wavelengths and wind speed. Even if the carrier frequency increases to X band, the phase modulation factor is still far smaller than 1 under A =0.1 m, and the clutter spectrum spread is f im .…”

“…When A=0.3 m, the phase modulation factor is near to 0.5, and the clutter spectrum spread is near to 3f im according to eq. (15). Compared to the clutter spectrum spread 2f im at low carrier frequency, the clutter spectrum spread in X band is only 1.5 times broader than 2f im , and far less than the variation times of carrier wavelength from UHF band to X-band.…”

“…Many special properties in bistatic system depend on the bistatic angle. When the bistatic angle is equal to or near to 180 • , this kind of radar system is known as forward scattering radar (FSR) system [1][2][3][4]15]. The system geometry structure is shown in Figure 1.…”

Detection-based localization of passive radar receivers

“…Based on the target path, two transmitters are chosen and then an optimum receiver location is determined. In [4], optimum receiver placement for a space-surface bistatic synthetic aperature radar (SS-BSAR) is studied using the relationship between the information matrix and the geometric configuration. In [5], an optimal layout is discussed for a Doppler bistatic network to detect weather echoes.…”

Statistic characteristic analysis of forward scattering surface clutter in bistatic radar

“…This system utilizes a continuous wave (CW) carrier frequencies in the VHF (about 69 and 151 MHz) band for target detection and rough target classification, as well as a higher frequency (about 434 and 869 MHz) in the UHF band for more precise target recognition [25]. Furthermore, a lot of related researches have been conducted on ground moving target (GMT) detection and recognition [26][27][28][29][30][31][32][33][34][35][36]. However, the experiment results show that the classification and recognition accuracy of GMT is strongly dependent on the motion parameters estimation of GMT.…”