IWR6843ISK-ODS: Seemingly switched Inphase and Quadrature Values

Hey Lars,

Thanks for reaching out regarding your question. One of our experts on raw data collection will get back to you within the next 24 hours.

Regards,

Kristien

I am looking forward to the reply!

In the meantime I tried making sense of it and can maybe give some additional information.

The source for my deinterleaving as stated in the original post under 'context' are two documents for mmWaveStudio ('Mmwave Radar Device ADC Raw Data Capture', 'mmWave Studio GUI'). These document focus on the output of mmWaveStudio. Having used my own software to send commands and receive data directly from the DCA1000EVM might use a different data format. This could be caused by changes that I made in the Radar Firmware or the commands that I send to the DCA1000EVM. Changing these parts might void the validity of the documentation in the mmWaveStudio files.

I could just accept that the documentation does not fit my setup anymore but I would like to understand which parameters make the difference here so that I dont get any unforeseen wrong data in the future.

What I changed in the radar firmware and by sending commands to the DCA1000EVM are the following:

• The changes to the firmware that I did on the "Hard Coded Config for OOB Demo" were only done in the two files which I put into the attachments ('hc_config_defs.h' , 'hc_config_profile_3d.h' in the folder 'mmwave_sdk_68xx_hcc_mss\mss'). The variables from these are explained in the MMWAVE SDK User Guide from page 14. In the file 'hc_config_defs.h' there is actually a variabel 'ADCBUF_HCC_SAMPLE_SWAP' (called '<SampleSwap>' in the MMWAVE SDK User Guide) which could have changed the sequence if inphase and quadrature data.
• For the direct commands and received data from the DCA1000EVM I used the CLI Tool and specifically the 'DCA1000EVM CLI Software Developer Guide'. I have attached the commands send by me to the DCA1000EVM as 'cf.txt' in the format in which they are explained in the 'DCA1000EVM CLI Software Developer Guide'. For receiving the data page 78 and 79 of the 'DCA1000EVM CLI Software Developer Guide' are important. Here the sequence of the inphase and quadrature numbers would be correct in context of what I have set in the radar firmware but the sequence of the interleaved RX antennas are not fitting to what I get.

hc_config_profile_3d.h        hc_config_defs.h

{
  "DCA1000Config": {
    "dataLoggingMode": "raw",
    "dataTransferMode": "LVDSCapture",
    "dataCaptureMode": "ethernetStream",
    "lvdsMode": 2,
    "dataFormatMode": 3,
    "packetDelay_us": 80,
    "ethernetConfig": {
      "DCA1000IPAddress": "192.168.33.180",
      "DCA1000ConfigPort": 4096,
      "DCA1000DataPort": 4098
    },
    "ethernetConfigUpdate": {
      "systemIPAddress": "192.168.33.30",
      "DCA1000IPAddress": "192.168.33.180",
      "DCA1000MACAddress": "12.34.56.78.90.12",
      "DCA1000ConfigPort": 4096,
      "DCA1000DataPort": 4098
    },
    "captureConfig": {
      "fileBasePath": "/home/pi/Desktop/REMUS",
      "filePrefix": "adcdata",
      "maxRecFileSize_MB": 1024,
      "sequenceNumberEnable": 1,
      "captureStopMode": "bytes",
      "bytesToCapture": 128,
      "durationToCapture_ms": 4000,
      "framesToCapture": 801
    },
    "dataFormatConfig": {
      "MSBToggle": 0,
      "laneFmtMap": 0,
      "reorderEnable": 1,
      "dataPortConfig": [
        {
          "portIdx": 0,
          "dataType": "real"
        },
        {
          "portIdx": 1,
          "dataType": "complex"
        },
        {
          "portIdx": 2,
          "dataType": "real"
        },
        {
          "portIdx": 3,
          "dataType": "real"
        },
        {
          "portIdx": 4,
          "dataType": "complex"
        }
      ]
    }
  }
}