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IWR1642BOOST: question about maximum range in 'Traffic Monitoring Object Detection and Tracking' example

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Part Number: IWR1642BOOST

Hello,

I have a question about 'TI Designs: TIDEP-0090; Traffic Monitoring Object Detection and Tracking Reference Design Using Single-Chip mmWave Radar Sensor' document. 

The above table is a copy from the mentioned document.

For Medium-Range MIMO example, using the provided parameters, I think the maximum range should be 38.94m instead of 70m. 

My calculation is shown as follows:

maximum beat frequency = 1/2 * ADC sampling rate; (from Nyquist criterion)

maximum range = speed of light * maximum beat frequency * sweep duration / (2 * sweep bandwidth);

then I got maximum range equals to 38.94m.

My question is: how can we get maximum range equals to 70m with the provided parameters?

Thanks in advance.

Regards,

Jiadi

  • Hello,

    The maximum range in the table is correct at 70m and was further verified with field testing. The test results are included in the reference document.

    Please refer to this application note on how to calculate max range from chirp parameters: http://www.ti.com/lit/an/swra553/swra553.pdf

    Amanda

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