二进制偏移载波调制技术研究

摘要

伽利略系统采用二进制偏移载波（BOC）调制，这种调制方式极大改善了导航信号的抗干扰性能。介绍了BOC调制方式的原理与性质，阐述了BOC调制与传统的二相编码复合（BPSK）调制相比较的优缺点，分析了BOC调制的功率谱密度：和自相关函数，并在现场可编辑门阵列（FPGA）平台上实现了BOC调制，最后给出仿真实验结果和实现频谱图，实验结果表明，该实现方式正确可行。%The BOC modulation technology is adopted in Galileo system. The paper introduces the theory and characteristics of BOC modulation, analyzes the difference between BOC modulation and BPSK modulation, and then implements BOC modulation at FPGA platform. Finally, the result is provided, and it shows that the implementation scheme is feasible.