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阐述了通用载波恢复环实现16QAM信号的载波恢复算法及该算法在FPGA上的工程实现。详细介绍了通用载波恢复环的工作原理,并利用System Generator对其进行建模与仿真。仿真结果表明,该环路能够轻松地实现高速解调信号的基带处理,准确的对载波频率、载波相位进行同步,保证了良好的稳态跟踪性能,而且信道噪声对载波同步的影响较小。
The carrier recovery algorithm for realizing 16QAM signal by universal carrier recovery ring and the project implementation of the algorithm on FPGA are described. The working principle of universal carrier recovery ring is introduced in detail and modeled and simulated by System Generator. The simulation results show that the loop can easily carry out the baseband processing of high-speed demodulation signal, accurately synchronize the carrier frequency and carrier phase, and ensure good steady-state tracking performance, and the influence of channel noise on carrier synchronization is small.