Gmsk demodulation matlab code

1. What is GMSK demodulation?
2. How does GMSK modulation work?
3. What is the difference between MSK and GMSK?
4. What is GMSK used for?

What is GMSK demodulation?

The GMSK Demodulator Baseband block uses a Viterbi algorithm to demodulate a signal that was modulated using the Gaussian minimum shift keying method. The input to this block is a baseband representation of the modulated signal.

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.

What is the difference between MSK and GMSK?

GMSK is the derivative of MSK modulation scheme and MSK is derived from Offset QPSK modulation. In MSK modulation scheme instead of rectangular pulse wave; half cycle sine wave is used. Frequency of logical zero and logical one differs by half of data rate. Modulation index is 0.5 here.

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.