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CCS/AWR1642BOOST: Implementation of Chinese Remainder Theorem (CRT) ; Use of two instead of at least 3 PRFs ??

Part Number: AWR1642BOOST

Tool/software: Code Composer Studio

Hi,

Please refer the original question. It states that the following command in MRR demo :

Vreal ≡ Vslow (mod 2Vs_max) ≡ Vfast (mod 2Vf_max)

As per original thread, the above equation is the implementation of CRT.

I am new to CRT and learning it.

I suppose that the Vslow and Vfast in the above relation, are the velocities derived derived from, say,  some PRFslow and PRFfast, which are in fact the two Pulse Repetition Frequency.

By the initial study of CRT, I understand that minimum 3 PRFs are required for use of CRT. however, in the above case, it seems that only two PRFs are used. Can you please comment and elaborate that is my understanding right and how and why did TI only use 2 PRFs for CRT instead of minimum required 3 PRFs as per the general CRT knowledge base?

Thanks and regards

  • Hi,

    Please see this thread with reference paper

    Thank you

    Cesar

  • Hi Cesar,

    Thank you very much for the provision of above paper. It was really very helpful and very well and clearly written.

    I add following for my and others information and I found that as a reply to my question that :

    Refer " Mark A. Richards, James A. Scheer, William A. Holm - Principles of Modern Radar - Basic Principles. 1-SciTech Publishing (2010) " ; which states on page 415 that :

    QUOTE

    In general, N PRFs are required to successfully disambiguate N – 1 targets. If the number of targets exceeds N – 1, ghosts can appear.

    UNQUOTE

    Best regards