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CCS/CC2640R2F: CC2640R2F

user5950524
Prodigy 10 points
Part Number: CC2640R2F

Tool/software: Code Composer Studio

Hi,

I,m very confused about the IQ samples.mainly two questions that I hope to be answered

1:in the guide of SDK , it says the carrier frequency is 250kHz, and the IQ is sampled on this signal waveform. Shouldn't the signal's carrier frequency be 2.4GHZ for a BLE signal? how can we calculate the AOA if we don't sample the received signal of 2.4GHZ?

2: have the IQ samples been demodulated by GFSK in the RFcore before they show on the UART? 

  • 0
    TI__Guru 56215 points
    1. The carrier frequency is 2.44GHz but the modulation for a 1 is the +250kHz deviation from the carrier frequency. When we captured the signal, we mixed it down to IF (250kHz) and then do the I/Q samples there.
    2. No, as stated the I/Q samples are taken at IF.