• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 1800 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AWR1243: SNR? Antenna gain? Max. range?

Canan Aydogdu
Prodigy 30 points
Part Number: AWR1243

I try to calculate the range of AWR1243 automotive radar in order to figure out its capability for LRR collision avoidance. My specific question is, how far maximum can a vehicle be in front for a successful detection? Did you ever measure this distance, what did you get?

What is the min SNR required for AWR1243 to successfully detect the car in front? This value is generally taken to be 3dB for skilled radars, about 3-10dB for typical radars, 10-20dB for tracking radars. How about AWR1243?

Lets assume that the frequency to operate is 76-77GHz. Besides the info given in datasheet  (TX Power: 12 dBm; RX Noise Figure: 15 dB (76 to 77 GHz)), I need to know the transmit antenna gain to calculate this max distance by the radar equation. What is the transmit antenna gain of AWR1243?  

How does this transmit antenna gain change by 2 simultaneous TX antennas or 1 TX antenna?

Best regards.

Canan

  • 0
    TI__Guru 58035 points
    Hello Canan,
    The max range measurable depends on multiple factors like antenna gain, detection algorithm used etc. The sensing estimator tool (dev.ti.com/.../) helps you estimate the range achievable based on your specific implementation of hardware design and algorithm used in the external processor.

    Please find below answers to your specific questions:

    >>What is the min SNR required for AWR1243 to successfully detect the car in front? This value is generally taken to be 3dB for skilled >>radars, about 3-10dB for typical radars, 10-20dB for tracking radars. How about AWR1243?
    AWR1243 is a front end only device, it sends out the raw received data to an external processor for processing and detection. The SNR required for detection is dependent on the algorithm you use in the processor that would receive the data from the AWR1243 device.

    >>Lets assume that the frequency to operate is 76-77GHz. Besides the info given in datasheet (TX Power: 12 dBm; RX Noise Figure: 15 dB >>(76 to 77 GHz)), I need to know the transmit antenna gain to calculate this max distance by the radar equation. What is the transmit >>antenna gain of AWR1243?
    I assume you are referring to the antenna gain of the AWR1243BOOST board. You can find the antenna gain plot in the AWR1243BOOST user guide. The peak gain is ~10dB. But you could implement your own antenna with the gain you desire, this is only a demo board and not necessarily a complete end product for LRR.

    >>How does this transmit antenna gain change by 2 simultaneous TX antennas or 1 TX antenna?
    The antenna gain does not change if you use 2TX or 1TX simultaneously. But depending on the antenna pattern used the beams from the 2 antennas could constructively add or substrate depending on the angle. Again this is highly dependent on the antenna you use.

    Regards,
    Vivek