Pulse passive bistatic radar target locating method

Abstract

The invention discloses a pulse passive bistatic radar target locating method and relates to the technical field of passive radar. The method is a method which provides a conventional pulse radar using circumference mechanical scanning as a non-cooperative irradiation source to carry out target locating for a onboard, a ship-bone and a submarine and other mobile platform The conventional pulse radar using the circumference mechanical scanning is used as the non-cooperative irradiation source, a movable receiving station adopts two universal antenna and two simple-structure receiving channels for processing direct waves and target scattered signals from a non-cooperative launch station, base line distance from the launch station to the receiving station, a target azimuth angle of the launch station and bistatic distance are calculated in real time, distance from the target to the receiving station and a target azimuth angle of the receiving station are solved thorough geometrical relationship of the bistatic station, and therefore the position relative to a receiver is confirmed. According to the pulse passive bistatic radar target locating method, a relative cheap receiving system is used for receiving radiating signals of enemy radar to achieve monitoring of a battle field area of enemy and an enemy scout surveillance system can not discover.

Description

1. Technical field [0001] The invention belongs to the technical field of passive radar, and in particular relates to a target positioning technology using a conventional pulse radar with circular mechanical scanning as a non-cooperative irradiation source when a receiving platform moves. 2. Background technology [0002] As we all know, the process of radar emitting electromagnetic waves to detect the target will also reveal the existence and location of the transmitter. In a hostile environment this would threaten launch platforms and even worsen international tensions. The transmitting and receiving devices of bistatic radar are separated, and the receiver platform can be kept silent. Bistatic radars are divided into cooperative and non-cooperative types, while non-cooperative bistatic radars are further divided into non-cooperative bistatic radars based on opportunistic radiation sources such as radio, television or satellite, and self- or even enemy-based radars accord...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in this type of system: 1) For mobile platforms such as airborne, ship-borne or submarine-borne, due to the limited size of the mobile platform, it is impossible to load the antenna of the TV broadcast signal frequency band that needs to reach a certain gain; 2) For sea target detection, especially in the open sea, civilian signal resources are very limited, and TV broadcast signals are almost impossible to receive in sea areas hundreds of kilometers away from the coast; 3) Since FM / TV or GPS signals are not specially designed for target detection However, its signal power (range) and signal bandwidth (distance resolution) are often not as good as radar signals

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