MATLAB: M-FSK Modulator Passband

communications blocksetfskfsk modulator passband

I found a "M-FSK Modulator Passband" at the Website frome the University of Florida. http://www.phys.ufl.edu/docs/matlab/toolbox/commblks/ref/mfskmodulatorpassband.html#243328

It is stated there as sub-Library from the Communication Blockset. But I can't find it in the Communication Blockset.

Is a "M-FSK Modulator Passband" part of a new realse of the Communication Blockset?

Best Answer

The M-FSK Modulator Passband block hasn't been around since R14 - check out the Release Notes.

You can use the M-FSK Modulator Baseband and M-FSK Demodulator Baseband blocks in conjunction with upconversion and downconversion blocks to model a passband M-FSK system. See the following demo: >> commpassbandmod

Related Solutions

MATLAB: How to set up an FSK model using the communication blockset to obtain a 2 tone signal

You can implement the FSK model by using a switch to select the source (binary '1' or binary '0'). Then feed the input to the 'M-FSK Modulator Baseband' block' setting the separating frequency as 1200Hz. You can view the response of the model by connecting Spectrum Scope.

See attached model for demonstration.

You can double click the switch to view the transitions between -600 Hz. and 600 Hz. This is because digital modulation is performed at baseband as detailed in the following URL:-

 <http://www.mathworks.com/help/releases/R2011a/toolbox/comm/ref/mfskdemodulatorbaseband.html>

You can modulate this baseband signal by 1800 Hz. to get the 1200 and 2400 FSK scheme.

MATLAB: How to perform EDGE Modulation using a Linearized Gaussian Filter using the Communications and Signal Processing Blocksets

Performing EDGE Modulation requires a very specific form of Gaussian Filter. This can be done in Simulink using the Digital Filter Block from the Signal Processing Blockset. However, care should be taken to give the exact filter coefficients in the Block parameters for this block to get the same functionality as the Linearized Gaussian Filter. More information on Digital Filter Block, type the following at the MATLAB command prompt:

web([docroot,'/toolbox/dspblks/digitalfilter.html'])

Also, there is a demo “Soft Decision GMSK Demodulator” in the Communications Blockset that you might find useful. You can access this from "Help -> Demos -> Blocksets->Communications->Modulation->Soft Decision GMSK Demodulator.

Observing the way GMSK modulator is configured in this demo model can help you setup your own modulator. Please go through the documentation for this demo. You can access it by typing the following at the MATLAB command prompt:

web([docroot,'/toolbox/commblks/ug/fp38538.html'])

Best Answer

Related Solutions

MATLAB: How to set up an FSK model using the communication blockset to obtain a 2 tone signal

MATLAB: How to perform EDGE Modulation using a Linearized Gaussian Filter using the Communications and Signal Processing Blocksets

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