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Does CC1200 (wavematch) still need 32-bit sync word with a good autocorrelation properties?

Oleg Pushkarev
Expert 1740 points
Other Parts Discussed in Thread: CC1200

Hi, 

Does it matter what sync word is used in CC1200? Will FF FF FF FF be the same good as default 93 0B 51 DE(due to Wavematch technologiy)?

BR

Oleg

  • 0
    TI__Guru**** 317180 points

    Yes. As I answered the sync search is correlation based. 6763.Wavematch_E2E.pptx

    No matter how you search for a sync word 0xFFFF will never be a good sync word since it's just a tone and you will never know if it's a tone or noise.

  • 0 in reply to TER
    Expert 1740 points

    Hi, Ter

    Could you help me to find a source for 32-bits sync codes with a good autocorrelation properties for using with CC1200 as address.  Quick search lead to scientific papers related to CDMA with just a lot of formulas. 

    Could you provide a list of good 32-bit sync words?

    Best regards,

    Oleg

  • 0 in reply to Oleg Pushkarev
    TI__Guru**** 317180 points

    We haven't done work on this. If you need a range of sync words I would make a Matlab script looping through all permutations and set up a rule for number of permitted sidelobes/ the amplitude for the side lobes.

    If you have to use the sync word as address you should use Strict Sync Word Check ( SYNC_CFG0[1:0]). Or you should use a fixed sync word and then use the address field for filtering.

  • 0 in reply to TER
    TI__Mastermind 36395 points

    Mathworks has done some work on generating Gold codes, see this link.

    http://www.mathworks.com/matlabcentral/fileexchange/24018-gold-code-generator/content/goldcode_seq_gen.m

    Regards,
    /TA