基于相位旋转的高阶调制信号载波同步快速捕获方法

By combining coordinate rotation digital calculation and phase amplification processing with fast Fourier transform and direct digital frequency synthesizer, fast and reliable carrier synchronization of high-order modulation signals is achieved, solving the problem of large frequency offset acquisition in high dynamic environment and reducing computational complexity and hardware resource consumption.

CN122027429BActive Publication Date: 2026-07-17HUNAN SIBEITU TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN SIBEITU TECH CO LTD
Filing Date
2026-03-31
Publication Date
2026-07-17

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Abstract

本申请涉及一种基于相位旋转的高阶调制信号载波同步快速捕获方法。所述方法包括：采用坐标旋转数字计算方法对符号同步后的32APSK信号进行瞬时相位计算，得到瞬时相位；将瞬时相位进行相位扩大，使每个符号的调制相位旋转至零相位，得到目标相位；对目标相位分别进行余弦运算和正弦运算，得到同相分量和正交分量；对同相分量和正交分量进行快速傅里叶变换，得到信号频谱；对信号频谱进行峰值搜索，确定峰值对应的频率值，通过多倍频率逆缩放运算，得到载波频偏估计值；基于直接数字式频率合成器根据载波频偏估计值生成补偿载波信号，将补偿载波信号与原始接收信号进行混频运算抵消载波频偏影响，完成载波同步捕获。
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