Description: This paper introduces a variety of information technology in information transmission and communication plays a supporting role, and for information transmission, digital communication has become an important tool. In this paper, according to today s modern communications technology, for QPSK modulation and demodulation signals are analyzed, and gives the U.S. company s Dynamic Systems Elanix design, simulation and analysis software for System Simulation System View the specific settings, an analysis of simulation results, and made use of FPGA technology to achieve the detailed methodology for such systems.
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