Ultra-wideband MIMO radar vital sign detecting and positioning method

Abstract

The invention belongs to the technical field of ultra-wideband radar signal processing, and discloses an ultra-wideband MIMO radar vital sign detecting and positioning method. The method mainly comprises the following steps of: (1) rearranging echo data of multiple channels of an MIMO radar; (2) performing sequential inertial coherence imaging and compensation on a target area; (3) carrying out band-pass filtering along a time dimension; (4) calculating the position of a living body thoracic cavity surface; (5) removing clutter and direct current bias; (6) taking a phase to obtain vital sign signals; (7) separating breathing and heartbeat signals; (8) detecting breathing and heartbeat signal peak values, and calculating an instantaneous breathing rate and a heart rate; and (9) performing sliding time window dynamic measurement. According to the method of the invention, three-dimensional positioning and vital sign measurement can be carried out on trapped persons under ruins and in buildings; and the method is high in signal processing gain, high in positioning precision, good in real-time performance and can realize instantaneous respiration rate and heart rate measurement.

Description

technical field [0001] The invention belongs to the technical field of ultra-wideband radar signal processing, and relates to a method for using ultra-wideband MIMO (multiple transmission, multiple reception) radar to detect and locate living bodies and simultaneously measure breathing and heartbeat signs. Background technique [0002] Electromagnetic waves can penetrate non-conductive media, especially low-frequency electromagnetic waves can penetrate materials such as sand, concrete, and brick walls, and are not easily affected by the environment and weather. They have great application value in disaster rescue such as landslides and fires, and can be used to detect People trapped in ruins or buildings, so as to rescue the trapped people in time to reduce casualties. [0003] The signal systems currently used by life detection radars on the market mainly include: (1) continuous wave radar, which can detect the presence or absence of living organisms and micro-movement info...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to disclose an ultra-wideband MIMO radar life detection and positioning method for the shortcomings of existing technologies such as inability to locate in three dimensions, poor coherence, and susceptibility to interference. The method has the advantages of accurate frequency measurement, accurate positioning, High signal-to-noise ratio, good real-time performance, and easy implementation

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