Howtosignalprocessing
- How GMSK works?
- How is GMSK differed from ordinary MSK?
- What is the importance of GMSK modulation scheme in multiuser communications system?
- What is GMSK demodulation?
How GMSK works?
GMSK (Gaussian Minimum Shift Keying) is a type of MSK that uses the same basic concepts, but applies a Gaussian filter to a signal before its frequency is modulated. A Gaussian filter uses a square wave to shape a signal to a more desirable output, allowing it to be transmitted to mobile devices without any flaws.
How is GMSK differed from ordinary 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.
What is the importance of GMSK modulation scheme in multiuser communications system?
Why GMSK is preferred for multiuser, cellular communication? It is a simple binary modulation scheme. Premodulation is done by Gaussian pulse shaping filter, so side lobe levels are much reduced. GMSK has excellent power efficiency and spectral efficiency than FSK.
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.
