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FPGA技术的发展与普及,以及FPGA成本的降低,使得越来越多通信系统直接采用FPGA设计与实现。由于QPSK的调制在信道利用率等方面比ASK,FSK高,同时算法复杂度比OFDM简单。在QPSK的解调中载波同步是实现解调的基础。因此,本文研究载波同步的设计与实现,涵盖System Generator仿真与FPGA实际验证的过程,最终实现QPSK解调。
The development and popularization of FPGA technology and the reduction of FPGA cost make more and more communication systems adopt FPGA design and implementation directly. As QPSK modulation in terms of channel utilization than ASK, FSK high, while the algorithm complexity than OFDM simple. Carrier demodulation in QPSK demodulation is the basis for demodulation. Therefore, this paper studies the design and implementation of carrier synchronization, covers the process of System Generator simulation and FPGA verification, and ultimately QPSK demodulation.