基于全相位的同频融合分层算法

摘要

For the signal with fast changing frequency,the identical-frequency fusion algorithm is of high precision and strong noise immunity,but its real-time performance is poor and its precision is largely affected by the error of initial phase measurement. So the identical-frequency fusion and hierarchy algorithm based on all-phase is proposed,in which the all-phase spectrum analysis algorithm is adopted to decrease the initial phase error,and the hierarchy algorithm is designed to reduce the large amount of real-time computation in the multi-loop,which is reduced several times without decrease in precision. As shown in theoretical analysis and comparison experiments,the algorithm can improve the identical-frequency fusion process obviously.%同频融合算法在处理频率快速变化的信号等应用中具有精度高、抗噪性好的优点，然而该算法实时性较差且精度受相位差测量影响较大。提出了基于全相位的同频融合分层算法，通过设计分层算法以减少多重循环中的冗余计算单元，可在不牺牲精度的前提下成倍降低运算量；采用全相位谱分析法降低相位差测量误差，明显改善了相位差补偿效果。理论分析与对比实验表明，该算法对同频融合过程有显著的改进效果。