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GSM signal acquisition

I have the following steps for passively acquisition of GSM signals and content extraction. Please advise if am missing any step.

 

Resource Name ->open sessions(niGSM/niRFSA/Modt) -> niGSMA & niRFSA attribute/device configurations ->Gaussian filter ->Generate filter coefficients ->niRFSA_FetchIQMultiRecordComplexF64 -> ModtFractionalResampleEx -> ModtMSKDemodulate -> ModtGetRecoveredBitStream

 

Do i need to take the bitstream through ModtViterbiDecoderSoftDecision_Rate?

Any direction on this will be highly appreciated.

 

Thanks.

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