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From: Teo on 29 Nov 2009 21:49
Hi!

I am very new to matlab and I am trying to design a physical layer for IEEE 802.15.4 in Simulink.
The model is like this:

Random Integer Generator-->Lookup Table-->Integer To Bit Converter-->OQPSK Modulator

-->OPQSK Demodulator-->Bit To Integer Converter-->Lookup Table 2-->Scope

I will add an AWGN block but I did this initially to test the model. Running the simulation and comparing the output of Random Integer Generator with the output of Lookup Table 2 they are not the same. Being a symmetrical design without noise, I would expect them to be the same. I tested the same model using QPSK and BPSK modulation and they are the same indeed. Could someone suggest a reason why it is not the same, using O-QPSK modulation and a way to fix this?

Thank you in advance.
Teo
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