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Original question:

AWR2544: Transmit signal and count received signals

AWRL1432BOOST: One radar as sender another as receiver

Joao Queiros
Prodigy 20 points
Part Number: AWRL1432BOOST

Tool/software:

Hello,

 

I am working with two AWRL1432BOOST radars and I am trying to configure one as a transmitter and the other as a receiver. My goal is to have one radar transmit a signal and the other capture it. However, I am facing multiple issues when trying to configure and test this setup.

Firstly, I´ve tried to use MMWave Radar Visualizer but I could not observe any clear response indicating that one radar was receiving from the other. I´ve used 2 different default configurations from the program, so this is probably wrong.

Secondly, I´ve used Putty to manually configure TX/RX and I could execute channelCfg, chirpComnCfg, chirpTimingCfg, and frameCfg commands without errors. However, when I run sensorStart, I always get the following error:

mmwDemo:/>sensorStart 1 0 0 0
Error: mmWave Config failed [Error code: -3108 Subsystem: 0]
Done

I also tried resetting the sensor with sensorWarmRst 0, but the same error appears.

Do you know how can I correctly configure one radar as TX and the other as RX? Do I need a specific configuration to allow one radar to transmit and the other to receive? And how can I verify that the RX is truly receiving the TX signal?

I would appreciate any guidance on how to proceed, including specific configuration steps or troubleshooting methods.

Thanks in advance!

  • 0
    TI__Genius 10730 points

    Hi, thanks for posting on our forum! An expert will be with you shortly. 

  • 0
    TI__Mastermind 39835 points

    HI, there:

    FMCW radar sends RF signal and received the same signal bounds back from the environment.   More specifically,  at receiver side, they will mix the received RF signal with its own TX signal to get the IF signal.   So if the radar B do not chirping at the exactly the same time as radar A, radar B will not receive any signal from radar A. 

    In general, FMCW radar is not designed to use as pair.  

    Best,

    Zigang 

  • 0 in reply to zigang Yang
    Prodigy 20 points

    Hi,

    I understand that FMCW radars are generally not designed to work in pairs, but I would like to know if anyone has successfully implemented a solution to achieve this.

    Is there any way to trigger a chirp via I/O so that we can synchronize two FMCW radars?

    Thank you.

  • 0 in reply to Joao Queiros
    TI__Mastermind 39835 points

    Hi, Joao:

    It is possible to synchronize two EVM board, one can be programmed as master and the other one can be programmed as slave mode.  The frame start signal of the master board can be used to trigger the frame start in the slave board.   And you can program the trigger mode and program the trigger delay to synchronize them.  But as mentioned below, this part of the function has not been tested.   At the same time, you need to change the board to feed the frame start signal from master board to the slave board.

    On the other hand, unless the two devices share the same clock, you will not be able to get perfect received signal like the single device case.  The devices on our cascade board will have perfect synchronization.

    Best,

    Zigang