FSK or Frequency-Shift Keying is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of carrier waves.
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Noise from CPFSK
I am programmatically generating a CPFSK encoding, and between shifting from two frequencies, there is extra noise generated by my speaker. For instance, going from 18375hz to 18900hz, there is extra ...
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Orthogonality of FSK modulation for non-coherent detection
For an FSK modulation with coherent detection, in order to ensure orthogonality, the frequency separation between symbols is $ \Delta f=f_2 - f_1 =1/2T$. However, in case of non-coherent demodulation, ...
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Finding BER, using FSK at GSM network
I would like to ask, cuz I don't know much from that, how we can find the BER at a GSM network (uplink & downlink separately of course), while we are using FSK modulation? I mean the equations ...
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How should I modulate a 16 bit input using FSK?
I need to graph a 16 bits binary sequence, assuming that it'll be a FM analog signal I need to apply FSK to it.
So, I think I should use the formula
$A \cos(2\pi f_1 t)$ for binary 1's
$A ...
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Why is Frequency Shift Keying more immune to noise than ASK?
Is it because noise manifests itself in the transmitted signal's amplitude?
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PC-to-PC data communication over Sound FSK / PSK / DSSS
For fun and work I've to implement a java based application that can Encode text or data to sound and transmit using PC's speaker and on the receiving side is a microphone with decoder software.
I ...
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Demodulation of noisy AFSK signal
I'm trying to implement a software audio modem with fsk to transmit and receive short digital data between two devices (ex a PC and an iPhone) so I'm simulating simple cases study using Scilab/Matlab.
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AFSK clock recovery in noise
What algorithms are available for optimizing estimated bit clock recovery of an audio FSK modulated signal over an extremely low S/N ratio channel? (e.g. barely audible due to high ambient noise and ...
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How to demodulate an AFSK signal in software
I am trying to transmit binary data from one device to another over an audio channel (speaker/mic). I use AFSK (Audio Frequency Shift Keying) as in Packet Radio, with $1200 \text{ Baud}$ and two ...
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Spectrum of FSK signal
I have implemented a simple V.23-like FSK modem in C here.
The peculiarity of the chosen modulation is such that 0's and 1's are sent as tones of two different frequencies (2100 Hz and 1300 Hz ...
