Howtosignalprocessing
- How does GMSK modulation work?
- Why GMSK modulation is used in GSM?
- Why GMSK is better than MSK?
- What is GMSK used for?
How does GMSK modulation work?
The Gaussian Minimum Shift Keying (GMSK) modulation is a modified version of the Minimum Shift Keying (MSK) modulation where the phase is further filtered through a Gaussian filter to smooth the transitions from one point to the next in the constellation.
Why GMSK modulation is used in GSM?
GMSK – Gaussian minimum shift keying – is the original circuit switched GSM modulation system, allowing the GSM radio channel to be modulated at a data rate of 271kb/s whilst keeping the radio channel within a 200kHz bandwidth. This is the modulation system used for circuit switched and GPRS operations.
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 GMSK used for?
GMSK is most notably used in the Global System for Mobile Communications (GSM), in Bluetooth, in satellite communications, and Automatic Identification System (AIS) for maritime navigation.
