a. Draw the block diagram for a coherent receiver for QPSK using the same basis signals as in problems ("What frequency must be used for basis symbols f1 = sin(pi*ct) and f2 = cos(pi*ct) with a symbol period of 1/(9600Hz) to contain 6 cycles of the sin and cos"). What are the impulse responses for the 4 matched filters?
b. Modify your program from a so that it now receives data which is 2 bits per symbol. Choose frequency multiples for your symbols and plot some representative messages.