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MSP430FR6047: MCU018

Anup Kumar
Prodigy 230 points
Part Number: MSP430FR6047


Tool/software:

I am using MSP430FR6047 development board. So while testing the Delta time of flight i saw that 

Delta time of flight = Shift index * sample period + Offset * Sample period.

The offset we calculate after 3 point correlation using Cosine interpolation.  I observed that variation in offset is due to the variation in amplitude of UPS signal & DNS signal captured by ADC.

Is my observation is correct? 

If correct then delta time of flight depends on amplitude of signal also.

Thanks,

Anup Kumar. 

  • 0
    TI__Mastermind 46765 points

    Hi,

    It is partly correct. Actually the SNR of the receive signal play an important role to impact the correlation calculation. If the receive signal is strong enough and usually the noise is very small at this status, you will get a good correlation results. 

    Best regards,

    Cash Hao

  • 0 in reply to Cash Hao11
    Prodigy 230 points

    Hello,

    I assume that "Envelope crossing threshold" parameter in USS GUI design center can be used to improve SNR. Correct?

    I am using Envelope crossing threshold = 11.

    What other ways to improve the SNR on development board?

    Regards,

    Anup Kumar 

  • 0 in reply to Anup Kumar
    TI__Mastermind 46765 points

    Hi,

    The Envelope crossing threshold can not help improve the signal SNR. 

    Usually the number of pulses, transmit frequency those can help improve the SNR.

    Best regards,

    Cash Hao

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