This article analyzes the problems of spatial, temporal and phase synchronization in non-cooperative passive bistatic radar coordinate meters, which make it difficult to detect weak objects. The method of time and phase synchronization based on the estimation of the parameters of the direct wave signal and the method of detecting weak objects, which consists of a long coherent accumulation of signal parameters, are investigated. A universal algorithm is proposed, which consists of two stages: extraction of direct wave pulses and parameter estimation. Based on the estimation of parameters and waveform, an algorithm for detecting weak targets based on the generalized Fourier transform is given.

Keywords: non-cooperative passive bistatic radar, algorithm, synchronization, pulse, generalized Fourier transform

This article analyzes the problem of determining the location of an object based on the method of passive positioning of single-station systems with a long baseline. The method proposed in the article implies that the antenna array is integrated into a single-station system with a long baseline using three antennas. The mentioned method is able to determine the actual location of the radiation object and the parameters of the object's position by estimating the phase difference and the actual direction of the radiation object. The simulation results confirm the validity of the proposed method.

Keywords: antenna array, passive positioning system, phase difference, bearing, azimuth, error