A digital TV signal mobile platform passive radar system and signal processing method

Abstract

The invention discloses a digital television signal mobile platform passive radar system and a digital television signal mobile platform passive radar signal processing method. The system comprises a receiving antenna array, a multi-channel analog front end, a signal collecting device, a signal processing device, a signal storing device and a mobile platform. The multi-channel analog front end is composed of signal analog receiving assemblies. The signal collecting device is composed of signal collecting assemblies, the signal processing device is composed of signal processing assemblies, and the signal storing device is composed of signal storing assemblies. The method includes the steps that firstly, direct wave signals are purified to obtain reference signals; then, amplitude phase correction is performed on the receiving antenna array; then, pre-filtering processing is performed in a time domain to filter out direct waves and short-distance ground clutters or sea clutters; filtering processing is performed in an empty time domain to filter out remaining empty time domain coupled ground clutters or sea clutters; finally, clutter characteristic analysis and distance Doppler two-dimensional calculation are performed to finish target detection. Low-level blind areas existing in ground-based radar can be eliminated, rapid maneuver deployment can be achieved, the clutters are restrained better, and target detection performance is improved.

Description

technical field [0001] The invention belongs to the field of passive radar, and relates to a passive radar system and a signal processing method of a digital television signal mobile platform. Background technique [0002] With the rapid development of electronic information technology, especially various anti-radar reconnaissance technologies, people have put forward more requirements for radar under the conditions of modern high-tech warfare. Not only high-performance target detection and tracking and anti-jamming capabilities are required, but also strong stealth and survivability. Passive radar has become a research hotspot in the field of radar due to its unique advantages. In addition, since the 1990s, with the global rise of digital broadcasting, digital TV, and digital communication networks, related systems have been gradually converted from analog to digital, and passive radar based on digital broadcasting and television signals has gradually become a research hot...

AI Technical Summary

Problems solved by technology

Passive radar based on a ground-based fixed platform, due to its height close to the ground, electromagnetic waves are easily blocked by terrain fluctuations and buildings, etc., affecting radar detection performance

And because the receiving platform is fixed, the mobility of the system is poor, which is not conducive to rapid mobile deployment

Images