To perform QPSK modulation and demodulation, you can use the “pskmod” and “pskdemod” functions by setting the order of modulation to 4.
The “pskmod” function is elaborated upon here, with the example of QPSK modulation provided, and the “pskdemod” function is elaborated upon here, with an example of the entire process of modulation, channel modelling and demodulation.
Thanks for soln, but I have done with this method. I have already said that i Dont want to use objects. i need to code it fully by own means. if anyone can help me to design a modulator without using objects it will be much appretiated.