NXP Semiconductors MKW01Z128, Reference Manual

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Sub 1 GHz Transceiver Architecture Description
MKW01xxRM Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc. 5-17
Figure 5-6. Cordic Extraction
5.7.10 FSK Demodulator
The FSK demodulator of the receiver is designed to demodulate FSK, GFSK, MSK and GMSK modulated
signals. It is most efficient when the modulation index of the signal is greater than 0.5 and below 10:
The output of the FSK demodulator can be fed to the Bit Synchronizer (described in Section 5.7.12), to
provide the companion processor with a synchronous data stream in Continuous mode.
5.7.11 OOK Demodulator
The OOK demodulator performs a comparison of the RSSI output and a threshold value. Three different
threshold modes are available, configured through bits
OokThreshType in RegOokPeak .
The recommended mode of operation is the "Peak" threshold mode, illustrated in Figure 5-7 :
I(t)
Q(t)
Real-time Phase
Real-time
Magnitude
0.5
 
2 F
DEV

BR
-----------------------
10

=