Howtosignalprocessing
- How is GMSK different from MSK?
- Why GMSK is better than MSK?
- What is the difference between GMSK and GFSK?
- What is the advantage of MSK and continuous phase modulation in terms of bandwidth?
How is GMSK different from MSK?
Gaussian minimum-shift keying, or GMSK, is similar to standard minimum-shift keying (MSK); however, the digital data stream is first shaped with a Gaussian filter before being applied to a frequency modulator, and typically has much narrower phase shift angles than most MSK modulation systems.
Why GMSK is better than MSK?
Gaussian Minimum Shift Keying (GMSK)
The GMSK form of modulation is based on frequency shift keying that has no phase discontinuities. It provides efficient use of the spectrum as well as enabling high-efficiency radio power amplifiers. It has much narrower phase shift angles than most MSK modulation systems.
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.
What is the advantage of MSK and continuous phase modulation in terms of bandwidth?
MSK is one type of FSK modulation with less occupied bandwidth. This leads to less interference to the spectrum. MSK uses half cycle of sine wave for each symbol. MSK with Gaussian filter gives GMSK signal.
