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AWR1243: What is the sensitivity of the RX of AWR1243?

user6223132
Prodigy 60 points
Part Number: AWR1243

What is the sensitivity of the RX of AWR1243? For example，can it arrive at -120dBm input? I wan to know the minimum value of the Rx which can be detected by AWR1243' ADC.

  • 0
    TI__Guru 58035 points

    Hello,

    The sensitivity of object detection depends on the noise figure of the receiver and the detection SNR used in the object algorithm.

    The noise figure number is provided in the device datasheet. The detection SNR will depend on your algorithm in the processor.

    Regards,

    Vivek

  • 0
    Prodigy 60 points

    hello,
    Thanks for your reply. Can you give me a typical experiment value. It's not be strict.





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    Vivek Dham replied to AWR1243: What is the sensitivity of the RX of AWR1243?.

    Hello,

    The sensitivity of object detection depends on the noise figure of the receiver and the detection SNR used in the object algorithm.

    The noise figure number is provided in the device datasheet. The detection SNR will depend on your algorithm in the processor.

    Regards,

    Vivek

     
     

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  • 0 in reply to user6223132
    TI__Guru 58035 points

    Hello ,

    Lets take an example. The thermal noise is -174dBm/Hz . If we take a noise figure of 14dB the noise level on the receiver is -160 dBm/hz.

    If you have a 512 samples per chirp and 5Mhz IF bandwidth , the bin size of each FFT bin is 5Mhz/512 = 9.765Khz. So the noise level per FFT bin in a chirp is = -160+10log10(9765) = -120 dBm.

    If you do coherent integration across 512 chirps in a frame that gives you a noise reduction of 27 dB (10log512). So across a frame the noise level is -120-27 = -147dbm.

    If you set a detection SNR of 15dB then you can detect an object at -122dBm input level.

    Regards,

    Vivek

  • 0 in reply to Vivek Dham
    Prodigy 60 points

    Hello, Vivek. Thank you very much.