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IWR6843: About HWA data compression issue

Morris Huang
Intellectual 450 points
Part Number: IWR6843

Hi,

IWR6843's HWA had provided the data compression and data decompression.

I use the HWA to do range FFT for ADC raw data, and using HWA's compress the data.

Then the data was moved to radar cube.

According to  the EGE algorithm, the data length of compressed data is not fixed.

Now I have two question.

1. How can I do the Doppler FFT? 

2. If I want to get a part of the radar cube data and decompress it, how can I do it?

Thanks.

Morris

  • 0
    TI__Mastermind 39915 points

    HI, Morris:

    At the output of the hardware compression engine, the data length of compressed data is fixed based on the compression ratio you are setting.  The extra data will be truncated to get the ratio you desired.  You can play with the MATLAB matching model of this compression engine to understand more, which is located below: 

    dev.ti.com/.../node

    In order to do the Doppler FFT, you will have to EDMA the data from radar cube into HWA, and run the decompression engine before doing Doppler FFT.   Unfortunately, we do not have a demo that uses compression engine yet.  

    Best,

    Zigang