The purpose of this chapter is to demonstrate several of the simulation programs developed in the previous chapter. Not all, or even most, of the simulation programs are discussed here as the user of the simulations is encouraged to experiment, make changes and in general expand upon the basic capabilities illustrated here. Specifically, the second-order PLL and the QPSK demodulation loop are discussed in some details in the following pages. First, however, we pause to examine the structure of the simulation programs and the assumed loop inputs.
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