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CCS/IWR1843BOOST: Cloud point signal questions

Toyota-1
Expert 1100 points
Part Number: IWR1843BOOST


Tool/software: Code Composer Studio

Dear TI 

            1   The  definition & unit  of signal vs noise ratio is db or others ? and the max & min range ?

            2   CFAR will effect cloud point size only ? why higher CFAR setting : low s/n of  cloud point can not be removed ? 

           3.   Higher CFAR & Higher SNR threshold vs Lower CFAR & Lower SNR threshold which one is better for people detect application  ? 

                 Why ? 

          4.  The antenna design and This mmwave radar SNR relationship ? which parameter can improve the SNR Uniformity , Because Gtracking only fit snr and cloud point .

BR

                

  • 0
    TI__Guru 50240 points

    Hi Toyota-1,

    Can you specify which particular lab are you using?

    Please allow a few days for a response.

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    TI__Mastermind 30405 points

    Hello,

    Please find the answers below:

    1. The  definition & unit  of signal vs noise ratio is db or others ? and the max & min range ?

    The unit of SNR is dB in steps of 0.1 dB. This is mentioned in the MMW demo HTML documentation under the docs directory. (Direct link to the PointCloudSideInfo structure file:///C:/ti/mmwave_sdk_03_03_00_03/packages/ti/datapath/dpu/rangeproc/docs/doxygen/html/struct_d_p_i_f___point_cloud_side_info__t.html

    2. CFAR will effect cloud point size only ? why higher CFAR setting : low s/n of  cloud point can not be removed ?

    Please refer to the Radar Hardware Accelerator User Guide - Part 2 (under CFAR section) a basic explanation of the CFAR algorithm. Essentially, the CFAR algorithm marks peaks as detected by comparing the SNR difference with the neighboring cells. The peaks for which the SNR difference is more than the configured threshold are marked as detected. So by configuring higher CFAR threshold will reduce the number of detected points due to the higher SNR threshold requirement (relative to the neighbor cells) 

    3. Higher CFAR & Higher SNR threshold vs Lower CFAR & Lower SNR threshold which one is better for people detect application  ? 

    In general it's always good to have a higher SNR with higher CFAR threshold (dependent upon application requirements) because it represents a better signal quality and hence better detection.

    Regards

    -Nitin