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version (3.18 KB) by Damith Senaratne
Implements a demodulator object for M-PSK physical layer network coding.


Updated 30 May 2012

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Facilitates 'XOR in the air' through ML detection of x = x1 + x2, where x1, x2 are data streams identically modulated with M-PSK.
The constructor accepts a 'modem.pskmod' object (of Communications System Toolbox), and creates a matching 'pskdemodXOR' object. Member function 'demodulate' handles the demodulation.
e.g. usage:
M = 8; K = 100;
hMod = modem.pskmod(M);
hDemod = pskdemodXOR(hMod);
D1 = randi(M,1,K)-1; x1 = modulate(hMod,D1);
D2 = randi(M,1,K)-1; x2 = modulate(hMod,D2);
D = hDemod.demodulate(x1+x2);
all(bitxor(D1,D2)==D) % ans = 1

Member functions:
1. demodulate (symbol-by-symbol ML detection),
2. show (displays XORed constellation),
3. mindist (computes min. distance between 2 points in the constellation)

Cite As

Damith Senaratne (2020). pskdemodXOR (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (0)


Changed phrase: 'XOR over the air' to in the description to 'XOR in the air', which is more proper.

MATLAB Release Compatibility
Created with R2011a
Compatible with any release
Platform Compatibility
Windows macOS Linux