An ultra-wideband mimo radar vital sign detection and positioning method

Abstract

The invention belongs to the technical field of ultra-wideband radar signal processing, and discloses a method for detecting and locating vital signs of ultra-wideband MIMO radar. The present invention mainly includes the following steps: (1) rearranging the echo data of multiple channels of the MIMO radar; (2) performing sequential inertial coherent imaging and compensation on the target area; (3) bandpass filtering along the time dimension; (4) Calculate the position of the thoracic surface of the living body; (5) remove clutter and DC bias; (6) take the phase to obtain the vital sign signal; (7) separate the breathing and heartbeat signals. (8) Respiration and heartbeat signal peak detection, calculation of instantaneous respiration rate and heart rate; (9) Sliding time window dynamic measurement. The present invention can carry out three-dimensional positioning and vital sign measurement on people trapped under ruins and in buildings, has high signal processing gain, high positioning accuracy and good real-time performance, and can realize instantaneous breathing 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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