18 November 2020

unid 318000Bd/228 GFSK (UHF)

Unid 318000Bd/228 GFSK spotted on 428 MHz and sent me by a friend of mine

Fig. 1

After the removal of the scrambler x^9+x^4+1, the bitstream shows an interesting 228-bit (or 12 x 19-bit groups) period.

Fig. 2 - 19-bit grouped stream
 
Fig. 3 - 228-bit period stream


https://yadi.sk/d/Ztlm4dzYC7UCuA

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