The Modulation signal QPSK
(Quadature Phase Shift Keying
.The circuit Quadature Phase Shift Keying (QPSK) is a powerful and popular Modulation circuit is widely used in the design of wireless data. (Wireless Communications) and in military equipment. The principle of the receiver - model transmitter QPSK.4 position in one request only time can transmit data at the same time each time 2 bits. This project uses principles of modulation demodulation and signal QPSK using pilot signal In a synchronous ionization between regions and sectors.Fabricate circuit, including the serve. Monitoring stability of a circuit. For military communication equipment the army last long career more. And purpose, another important factor is.Which will be effective in the teaching and learning on the topic of communication system and to view a เลตสั signal digital.
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