[PLAIN]http://img100.imageshack.us/img100/702/bersimulationresult.jpg [Broken] I run a simulation on matlab, and obtain the plot above. The red and green line is using BPSK and QPSK modulation, while the blue line is using 8psk modulation. My questions are: (a) is it true that BPSK and QPSK BER performance is almost identical? (b) why is the line plot from matlab stop at 9 and 10 for BPSK and QPSK modulation eventhough both have same parameter like 8psk (except for the parameter M)? any way i can adjust it?