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    188宝金博页面版: vital_signs_68xx_DevelopersGuide

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    内容提示： OverviewThis lab exercise demonstrates the ability of IWR6843 TI-mmWave sensor to measure body displacements due to breathing and heart beat.Typical body surface displacement parameters due to breathing and hear-beat areTo measure these small scale vibrations/displacements, we measure the change in phase of the FMCW signal with time at the target rangebin Code Composer Studio (CCS) project along with source code is provided for this labPre-built binary fi les are also provided that can be loaded on to the ...

    文档格式：PDF | 页数：13 | 浏览次数：17 | 上传日期：2024-04-26 10:20:47 | 文档星级：
    OverviewThis lab exercise demonstrates the ability of IWR6843 TI-mmWave sensor to measure body displacements due to breathing and heart beat.Typical body surface displacement parameters due to breathing and hear-beat areTo measure these small scale vibrations/displacements, we measure the change in phase of the FMCW signal with time at the target rangebin Code Composer Studio (CCS) project along with source code is provided for this labPre-built binary fi les are also provided that can be loaded on to the IWR6843 EVMTheoryFMCW BasicsPeriodic linearly-increasing frequency chirps (known as Frequency-Modulated Continuous Wave (FMCW)) are transmitted by radar towardsthe objectTransmitted FMCW signal is given by Signal at the receiver is a delayed version of the transmitted signal The received signal from an object at range R after mixing and fi ltering is given byFMCW Radar - Vital Signs MeasurementsNote that for a single object, the beat signal b(t) is a sinusoidal and has both frequency fb and phase To measure small scale vibrations, we measure the change in phase of the FMCW signal with time at the object range bin. If an object movesa distance ΔR then the change in phase between consecutive measurements is given by Phase can be measured by taking the FFT of the beat signal b(t) and computing the phase at the object range-bin.Suppose we take the FFT and the object is at range-bin m, then the vibration signal x(t) can be extracted by measuring the phase at range-binm at time indices nTs , where n is the chirp index and Ts is the time between consecutive measurements

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