Implementation- QPSK

1. Code for the Quadrature Phase Shift Keying(QPSK)  modulator and demodulator
2. Modulator blocks are:
     a. Serial to parallel converter
     b. RZ to NRZ converter
     c. Balanced modulator
     d. Oscillator
3. QPSK demodulator blocks are:
     a. Balance demodulator
     b. Low pass filter
     c. Sampled and hold data
     d. NRZ converter
     e. Multiplexer