Attempt at Quadrature Phase Shift Keying or QPSK

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01:59:07

Play with the switches at the bottom middle and see the results.

To the bottom left is the modulator and the rest from top to right is the demodulator.

This is my attempt at QPSK which is another digital wireless method. Similar to a Binary Phase Shift Keying (a two phase that sends 1 bit at a time). 

Unlike the BPSK, the QPSK uses 4 phases to send 2 bits at a time in the same bandwidth making it much easier to send more information.

The space in this simulator is too small to add flip flop circuits and logic gates, so I had to work within limits.

I have to admit its not perfect but I made the best of it. And to add... this was frustrating... just ask my hair thats on the floor and missing from my head. haha ... and the broken tablet that I now have to replace. 

If you know how to do bits in math than you would know how effective this method is.

This is a simulator to see what make QPSK tick.

If you can do a better simulator then I would enjoy seeing it.

published 6 years ago

hurz

6 years ago

before EveryCircuit V2.18 and its damn propagation delay which cant be set optional, it was easy to demo such systems. Cuz XORs were able to work as perfect multiplier (rf mixer) without any delay! But now its a pain ... anyway keep up the good work!

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