Information in GFSK signal

1. How does a GFSK work?
2. What is the difference between GFSK and FSK?
3. What is a GFSK transmitter?
4. What is the difference between GMSK and GFSK?

How does a GFSK work?

Gaussian frequency-shift keying (GFSK) is a type of FSK modulation which uses a Gaussian filter to shape the pulses before they are modulated. This reduces the spectral bandwidth and out-of-band spectrum, to meet adjacent-channel power rejection requirements.

What is the difference between GFSK and FSK?

First of all, GFSK modulation is a much cleaner signal than FSK. This is because GFSK process filters out spurious to a much narrower transmission bandwidth than FSK. But in addition to that, we are now transmitting at 76.8Kbps which has a much wider bandwidth than 4.8Kbps we used before.

What is a GFSK transmitter?

Gaussian frequency shift keying (GFSK) is a modulation method for digital communication found in many standards such as Bluetooth, DECT and Wavenis.

What is the difference between GMSK and GFSK?

With GMSK, the frequency modulation index is 0.5. With GFSK, the frequency modulation index is larger than 0.5 (the signaling tones are farther apart). The receiving techniques used for GMSK as an FSK work for GFSK.