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Questions tagged [gmsk]

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GMSK/GFSK BER simulation in GNU Radio : How to specify signal energy

In GNU Radio, BER vs SNR can be measured by fixing the signal energy and varying the amplitude of the noise source block. For example, in BPSK, we have transmitted signal $s\left(t\right)$ with a ...
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204 views

BER vs SNR simulation for GFSK modulation (Closed-form BER for GFSK)

I'm in the process of simulating the performance of a GFSK modem in GNU Radio. I have managed to get a curve similar to the curves I see in a number of literature sources. However, I need an accurate ...
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Modulation Index in Case of Quadrature Modulation (IQ-modulation)

It says that in case of quadrature modulation, the modulation index can be maintained at exactly 0.5 without any settings or adjustments. I don't get it why. What is it which is making it sure that ...
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358 views

GNURadio Sending Short Packets

I'm trying to create a basic GNURadio flow graph that will transmit a short message in order to receive an appropriate reply back. I currently have the following flowgraph: I have a program that ...
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0answers
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How to find and fix the delay of a modulation

I am creating a model in MATLAB to simulate power line communication, but I found a problem. I'm very new to the DSP area, I get my code below from a MATLAB example. ...
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1answer
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difference between GMSK (Gaussian Minimum shift keying) and GFSK (Gaussain frequency shift keying) [closed]

I am unable to differentiate GMSK and GFSK. How do the modulation techniques differ in Tx? How do their receiving techniques differ..?
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307 views

GMSK Big error in demodulation MatLAB Simulink

I am trying to do a PLC simulation system, but my problem is in GMSK demodulator, in my simulation in Simulink MatLAB my output signal is very different from the input signal, below the model: Below ...
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543 views

Confusion in GMSK Demodulation

I'm trying to implement this GMSK demodulator. Is the input to deviator in degrees? do I have to change it to radians? Does the output of the deviator has to be NRZ or Have to convert it to NRZ? I'm ...
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338 views

Simplest All Digital GMSK Modulator

What is the simplest way to implement an all digital GMSK modulator with no multipliers? The implementation approach should be applicable to GMSK modulation with BT=0.5 or less (where intentional ISI ...