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AWR2544: The performance comparison between AWR2944 and AWR2544

Rata Zhang
Expert 2840 points
Part Number: AWR2544
Other Parts Discussed in Thread: AWR2944

Hi,

   Can any one tell me the differences betweent the two chips，from these aspects,such as  the max measure range,  azimuth resolution，elevation angle resolution, the number of cloudpoint etc;

BR

Rata

  • 0
    TI__Mastermind 20605 points

    Hi Rata,

    Here are some high-level thoughts regarding your question:

    • The AWR2544 device mainly targets a satellite architecture for sensing and processing where the range processing is performed on the radar SoC and the further processing is performed on a main ECU of the vehicle. We will not be able to put fixed numbers to such system level parameters since they are heavily dependent on the processing chain, antenna etc. The processing can be expanded based on the central ECU capabilities, so it would depend on that.
    • With respect to what the capabilities of the front end itself are, you can see the device data sheet for each of the AWR devices and obtain these numbers as per your intended use of the AWR2544 systems. This could be with respect to the SNR improvement due to LOP technology on the 2544 etc.
    • One additional change is that the HWA on the AWR2544 (HWA 1.5), now features a real 2x mode which can reduce the overall range processing timings by half which can allow you to have more samples per chirp or shorter inter chirp times.

    Combining the points above, you should be able to determine the capabilities of the system for your use case.

    Regards,

    Kaushik

  • 0 in reply to Kaushik Gowda
    Expert 2840 points

    Hi Kaushik,

        Thanks for your reply. Now AWR2544LOP EVM can be provided. If I use this demo board,  is the performace better or worse than AWR2944 EVM in the aspects,such as  the max measure range,  azimuth resolution, elevation angle resolution, the number of cloudpoint etc?

        For example the max range is up to 200m for the AWR2944 EVM, the azimuth resolution is 9.5°, the azimuth field of view ±80º and so on.   Whether are the level parameters almostly similar about the two boards?  Because  the two EVMs are both   4 receive and 4 transmit channels, the TX power ,phase noise and Rx noise  figure parameter are similar.   What is the level parameters  of AWR2544LOP EVM?

    BR

    Rata

  • 0 in reply to Rata Zhang
    TI__Mastermind 20605 points

    Hi Rata,

    It appears that my point has not come across clearly and there is still some confusion. System level parameters such as the max range, max velocity, range and velocity resolution, and number of point cloud are heavily dependent on the processing capabilities of the device. 

    For example, If there is more memory and processing capabilities, you can have a larger number of DDM sub-bands. more number of samples, larger cube, higher resolution FFT and more advanced angle estimation algorithms such as MUSIC etc. On the 2544, only the range processing is done on the SoC and the 1D FFT data (compressed) is sent out to a central processor. There are also multiple AWR2544 devices intended for use around the car in a satellite architecture whose data will be combined and processed together. This can significantly alter parameters like angular resolution, field of view in azimuth etc. 

    In a single device to device comparison, what the AWR2944 and the AWR2544 output will be different. That is to say, the AWR2944 device provides a point cloud or an object list whereas the AWR2544 outputs the full 1D Radar cube. (You can also refer to our demos for this)

    Regards,

    Kaushik

  • 0 in reply to Kaushik Gowda
    Expert 2840 points

    Hi Kaushik,

      Thanks for your detailed reply.May be my expressiong is not clear.

       As you said, the max range, max velocity, range and velocity resolution are heavily dependent on the processing capabilities of the device such as memory or processing capabilites ,or algorithm. It is very reasonable.Now we do not consider these factors, we view this problem in the physical level.

          Now only considering the antenna  itself , we take the max range Rmax as an example. The formula can be expressed as belows:

     

    Here, Rmax is the physical limit max range.  From this formula, if AWR2944 Rmax is same with AWR2544,can I say that the two EVMs  deliver the same performace?

    Another is azimuth resolution, if super resolution algorithm is introduced, the angle resolution can be improved,but it is suitable  for both AWR2944 and AWR2544.Now without considering the super resolution algrithm, the azimuth resolution is decided by the number of Tx and RX antennas.In this level, can I say the resolution are idential for AWR2944 and AWR2544.

    BR

    Rata

  • 0 in reply to Rata Zhang
    TI__Mastermind 20605 points

    Hi Rata,

    With respect to the front-end only capabilities, the performance of the AWR2544 would be very similar to that of the AWR2944. The main difference comes with the SNR improvement with the LOP packaging of the device. This makes it such that farther objects can be distinctly detected instead of being buried in the noise floor.

    Regards,

    Kaushik

  • 0 in reply to Kaushik Gowda
    Expert 2840 points

    Hi Kaushik，

        Thanks for for your reply, I got it. I have another problem, you said ' The main difference comes with the SNR improvement with the LOP packaging of the device.',  why is  SNR improved  with the LOP packaging of the AWR2544LOP EVM?Or which parameter can illustrate this point?

    BR

    Rata

  • 0 in reply to Rata Zhang
    TI__Mastermind 20605 points

    Hi Rata,

    Recommend you go through this document for an insight on LOP technology,

    Advancements in mmWave Technology: Launch on Package for Automotive Radars

    Regards,

    Kaushik

  • 0 in reply to Kaushik Gowda
    Expert 2840 points

    Hi kaushik,

     Thanks for your reply, I will do that.

    BR

    Rata