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AWR1843BOOST: Allowable params value: ADC Sampling rate and no of loops per frame

Part Number: AWR1843BOOST


Is it necessary that no of ADC samples (in profile config) per chirp, and no of  loops per frame(frame configs) should be perfect powers of 2 (i.e.. 16,32,64,128,256, or 512)?

What is the max memory that can be used per frame in an AWR 1843 chip

Can I use 2 RX and 3 TX as a configuration? What will be the pros and cons? I am trying to detect very feeble detections from thin wires, and need to understand what configuration of antennas will be best for my use case, and what parameters to tweak

  • Hi Mihir,

    • Is it necessary that no of ADC samples (in profile config) per chirp, and no of loops per frame (frame configs) should be perfect powers of 2 (i.e. 16,32,64,128,256, or 512)?
      There is no need for these parameters be perfect powers of 2.

    • What is the max memory that can be used per frame in an AWR 1843 chip?
      There is 1MB of memory on the L3 and 32KB of ADC buffer. Based on this and your requirement you should be able to calculate the max memory you would require per frame.

    • Can I use 2 RX and 3 TX as a configuration? What will be the pros and cons? I am trying to detect very feeble detections from thin wires, and need to understand what configuration of antennas will be best for my use case, and what parameters to tweak.
      You can use 2Rx and 3 Tx in your configuration. The pros will be that there will be only channels of Rx which will have half the size of 4 Rx configuration. This will save on processing time, power consumption, memory requirements etc. By using only 2 Rx you will also lose your angular resolution by half, thinner point cloud, SNR when performing integration across Rx will be lower when compared to 4 Rx. The main problem with thin wires from what I see would be its RCS. We do not have existing solutions for an application that would need to look at such intricate objects and hence the support will be limited.

    Regards,

    Kaushik

  • In line with 3, the datasheet says that angular resolution is 14 degrees, does it mean that any 2 detections will always be 14 degrees apart in space? (for 2d configs)

  • Hi Mihir,

    Your understanding is correct. 

    Regards,

    Kaushik