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IWR1443BOOST: multiple questions in various areas

Juan Gonzales
Mastermind 37340 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443

1)      Is it safe to assume the noise level in the data sheet is the level well-beyond the flicker noise region? 

2)      I am looking for the noise corner frequency.  A plot of noise vs. frequency would be ideal. 

3)      I would also like close-in phase noise levels  

4)      Is there a demo that measures radar return strength from a flowing water surface. What is the best way to do this with the eval kit?

  • 0
    TI__Mastermind 37500 points
    Hello Juan,

    Questions 1, 2, and 3 relate to factory test data, that is not in the datasheet. The specifications in the IWRand AWR sensor datasheets
    for the Clock subsystem, the phase noise is listed as -91dbc/Hz, the transmitter amplitude noise is listed as -145dbc/Hz (not the same as phase noise). I will ask the characterization engineers what data we have to share on E2E.

    Internal to the Radar Sensor we have a crystal analog block, followed by a PLL, then dividers, timing engine, synthesizers, and a frequency multiplier, then the RF section. There are typically RF Transmitter, and RF receiver tests. I will ask the characterization engineers what data we have to share on E2E.

    The EVM comes with a 40Mhz crystal oscillator, for lower clock phase noise, an external 1.2v 40Mhz clock is substituted, this requires part changes, and soldering to components on the EVM, to attach the 40Mhz external clock, and GND.

    Some customers have modified the EVM for external clock, and used a fixed frequency Tx output, reference antenna, and spectrum analyzer to evalute the Tx phase noise.

    Question 4 - there are no water flowing designs. The mmwave Sensing Estimator can be used to configure the FMCW parameters.

    Then it depends on the EVM hardware utilized:
    a) IWR1443 BOOST EVM - USB connection - the mmwave SDK has a Data Capture demo. I would think the data capture demo would provide the FMCW radar range IQ data. The mmwave Sensing Estimator is used to generate a set of FMCW Chirp and Frame parameters. When this is run in the data capture demo, the IQ data can be captured to a CCS dat file, and then post processed. I think the mmwave SDK User Guide discusses a matlab script for data analysis.

    b) IWR1443 BOOST EVM - USB connection - the mmwavve SDK has an Out of Box demo. In this case the Visualizer has a best velocity resolution, the newer visualizer can capture some of the GUI data.

    c) TSW1400, Devpack, IWR1443 BOOST EVM - this set of EVMs uses the Radar Studio software. This has the ability to collect more frames
    to memory and there is an example matlab script for exporting the radar sensor data.

    Regards,
    Joe Quintal