CCS/IWR1642: IWR1642

Prodigy 120 points

Replies: 3

Views: 32

Part Number: IWR1642

Tool/software: Code Composer Studio

What is TI IWR1642's 77Ghz FMCW advantage over same Bandwidth UWB?

Since there are so many UWB radar available recently, we would like to know why (how much in which quality)we should go with TI 1642 solution?

Specially we are interested in project "Vital Sign". Several UWB radar baord offers vital sign measuring distance over 8 meter. What can be the good reason for FMCW TI solution over UWB module?

3 Replies

  • Hello,

    1) Fundamentally at mmWave frequencies such as 77GHz/60GHz wavelengths are smaller this helps in getting the Antenna size smaller and hence over all smaller solution leading to smaller board size and lower cost of over all system.

    2) Better range resolution : With 4 GHz continuous Bandwidth gives better range resolution

    3) If you compare with the Pulse radars UWB radars, FMCW radar offers lower IF frequency band, hence lower sampling rates leading to simpler ADC and signal processing chain. This enables low power architecture based Radar system.

    4) Rich point cloud, better velocity resolutions are better.

    You could review below application note for getting higher level understanding advantages working with mmWave sensing as compared to UWB.
    www.ti.com/.../spry328.pdf
  • In reply to CHETHAN KUMAR Y.B.:

    1) Fundamentally at mmWave frequencies such as 77GHz/60GHz wavelengths are smaller this helps in getting the Antenna size smaller and hence over all smaller solution leading to smaller board size and lower cost of over all system. 

    [kisub] According to your comment, comparing to 24Ghz UWB, it would be about 3 times smaller with the same accuracy. Right?


    2) Better range resolution : With 4 GHz continuous Bandwidth gives better range resolution

    [kisub] FMCW 4Ghz vs UWB 250Mhz. Therefore, it should be 16 times better in terms of range resolution. For example, UWB 100 meter coverage vs FMCW 400 meter coverage.

    3) If you compare with the Pulse radars UWB radars, FMCW radar offers lower IF frequency band, hence lower sampling rates leading to simpler ADC and signal processing chain. This enables low power architecture based Radar system. 

    [kisub] Lower IF frequency band > Simpler ADC, Signal Processing Chain. Accordingly Low power. 

    4) Rich point cloud, better velocity resolutions are better.
    [kisub] Even though TI FMCW offer more rich point cloud and support only 1 meter distance measurement, Several UWB radar baords offer vital sign measuring distance over 8 meter.  What would be the reason for the longer distance measurement?


    You could review below application note for getting higher level understanding advantages working with mmWave sensing as compared to UWB.
    www.ti.com/.../spry328.pdf

  • In reply to CHETHAN KUMAR Y.B.:

    1) Fundamentally at mmWave frequencies such as 77GHz/60GHz wavelengths are smaller this helps in getting the Antenna size smaller and hence over all smaller solution leading to smaller board size and lower cost of over all system.

    [kisub] According to your comment, comparing to 24Ghz UWB, it would be about 3 times smaller with the same accuracy. Right?


    2) Better range resolution : With 4 GHz continuous Bandwidth gives better range resolution

    [kisub] FMCW 4Ghz vs UWB 250Mhz. Therefore, it should be 16 times better in terms of range resolution. For example, UWB 100 meter coverage vs FMCW 400 meter coverage.

    3) If you compare with the Pulse radars UWB radars, FMCW radar offers lower IF frequency band, hence lower sampling rates leading to simpler ADC and signal processing chain. This enables low power architecture based Radar system.

    [kisub] Lower IF frequency band > Simpler ADC, Signal Processing Chain. Accordingly Low power.

    4) Rich point cloud, better velocity resolutions are better.
    [kisub] Even though TI FMCW offer more rich point cloud and support only 1 meter distance measurement, Several UWB radar baords offer vital sign measuring distance over 8 meter. What would be the reason for the longer distance measurement?