| QPSK’s full name is Quadrature Phaseshift Keying which is a kind of digitalmodulation types. It has been widely used in wireless communications and hasbecome very important in modern communication because of its high bandwidthefficiency and strong anti-interference performance.Based on the principle of different digital modulation types, this paper designs aQPSK communication system using the Matlab language and the Simulink Toolboxesin Matlab. Through the the result of simulation and the principle of the modulation,the performance of the system is analyzed and the feasibility of the simulation modelis proved. Finally, further realization of the system in the ideal channel respectivelythrough, through Gauss channel, first by Gauss white channel through the Rayleighfading channel simulation design, comparative analysis of the performance of thesystem under different conditions. The result basically conforms to the theory, forunderstanding the QPSK system performance and system for the design of thepractical application, offers an effective reference. |
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