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CC2745R10-Q1: [BLE 6.0 CS DKC]Channel sounding fixed-point ranging test shows abnormal fluctuations in distance values.

Peisheng Yang
Intellectual 680 points
Part Number: CC2745R10-Q1

Tool/software:

Hi, Ti

*SDK version: 9.11.01.19

During fixed-point testing at 1-15 meters with the new SDK (9_11_01_19) (60 range measurements per meter interval using Python scripts), we observed significantly larger fluctuations in distance values at fixed points compared to previous versions (9_11_00_18, 9_11_01_09, 9_12_00_19). Are you experiencing similar issues on your end?

code&log.zip

The figure below shows the staircase plot we generated (SDK_9_11_01_19)：

I've attached the current code and scripts I'm using, along with the fixed-point test logs. After switching to the NN algorithm, are there any parameters that need adjustment? Since we previously tested exclusively with the MUSIC algorithm.

Best regards!

Preston

  • 0
    Intellectual 680 points

    Hi, Ti

    Attached is the channel sounding ranging staircase plot(MUSIC algorithm) for SDK (9_12_00_19)：

    We need to optimize the ranging results of the NN algorithm to match those of the above figure (MUSIC algorithm). Are there any other parameters that need debugging?

    Best regards!

    Preston

  • 0 in reply to Peisheng Yang
    TI__Expert 6285 points

    Hello Preston, 

    Understand the concern and frustration. The team is still developing the algorithms and are considering the next steps in algorithm development. 

    The neural network in the current SDK is trained for the inside of a vehicle. Please try this to see better results. Additionally, thank you for the feedback on the algorithm. 

    Thanks, 
    Isaac

  • 0 in reply to Isaac Larson
    Intellectual 680 points

    Hi, Isaac

    Isaac Larson said:
    The neural network in the current SDK is trained for the inside of a vehicle.

    What does 'trained for the inside of a vehicle' specifically refer to? Does it mean the initiator or the reflector is placed inside the vehicle?

    Best regards!

    Preston

  • 0 in reply to Peisheng Yang
    TI__Expert 6285 points

    Hello Preston, 

    The initiator will be placed inside the vehicle, in the center console. Neural networks are "trained" on phase data collected from a specific environment. The current SDK neural network is trained from the center console of a vehicle. 

    Thanks,
    Isaac