thanks samsung and alitsu for ur replies. Now I want to draw a graph between Power per channel and Q factor or BER for WDM-PMQPSK system. I am using PM_QPSK Coherent transmitter. How can i select power per channel from PM-QPSK transmitter.
In some papers I have seen that the graphs are drawn between Power/channel and OSNR at some prescribed BER i.e at BER<10e-3 or some other value. How can We select particular value for BER to draw graph.
kindly reply