Real-time detection and separation method of multiple moving objects by through-the-wall radar

Abstract

The invention relates to a real-time detection and separation method of multiple moving objects by a through-the-wall radar. The method comprises: a complex background signal is rejected by using a clutter suppression algorithm based on an exponential smoothing filter and information of moving human objects can be kept rapidly and accurately; with an envelope detection algorithm based on Hilbert transform, all moving objects are arranged at different envelope peaks; and all moving objects can be separated at different areas rapidly according to an algorithm based on combination of a fixed threshold value and an adaptive threshold value. According to the invention, the method which is simple has the high execution efficiency and is suitable for detection on multiple moving human objects by a portable through-the-wall radar; a powerful guarantee can be provided for accurate positioning of all moving objects by the through-the-wall radar; and the working efficiency of the through-the-wall radar can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of through-wall radar, in particular to a method for real-time detection and separation of multiple moving targets by through-wall radar. Background technique [0002] Wall-penetrating radar has attracted widespread attention from all walks of life since its inception. In 2009, the British "New Scientist" magazine listed wall-penetrating radar as one of the ten most promising technological inventions in the next 30 years, saying its The role will have a huge impact on modern human life just like mobile phones and the Internet. As a new technology under development, through-wall radar can be widely used in military, anti-terrorism, disaster relief, medical treatment, security, security inspection and other fields. [0003] For the through-wall radar technology, domestic and foreign scholars mainly focus on the hardware design of the through-wall radar and its signal processing technology. Target detection, ...

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Problems solved by technology

[0004] However, in the multi-moving target scenario, due to the complex echo signal composition of the through-wall radar, it includes the direct coupling wave between the transmitting antenna and the receiving antenna, the reflected wave of the wall interface, the thermal noise of the system and the white noise of the surrounding environment, radio frequency Interference signals and reflected echoes of targets behind walls, etc., especially because the echo signals of each target in the multi-moving target scene interfere with each other after multiple reflections, resulting in more complex echo signal components, and the real target is submerged in it, making it difficult to The real target is detected, so the progress in the automatic detection and positioning of multi-moving targets is not satisfactory

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