【摘要】 针对正弦信号频率估计复杂度和性能难以兼顾的问题,提出一种基于双门限判决修正Rife算法的频率估计算法.将信号频点划分为3个区域分别采用不同处理方案,具有估计精度高、运算量小的特点,适用于低功耗、低延时等应用场合.仿真结果表明,该方法克服了经典Rife算法在部分频点估计误差大的问题,其频率估计均方根误差距离克拉美罗界仅有0.5dB.与现有其它改进Rife算法相比,该方法在保证估计性能基本不变的前提下大幅降低所需计算量,有利于工程实现.更多还原

【Abstract】 In order to make a good tradeoff between the complexity and performance for frequency estimation of sinusoid,a frequency estimation algorithm with high estimation accuracy and low computation was proposed based on the dual-threshold decision fixed Rife algorithm.The frequency was divided into three domains with different processing schemes,which would be suitable for low power consumption and low-delay applications.Simulation results show that the method overcomes the inherent flaw of the classic Rife algorithm,and the RMS(root mean square)error for the estimated frequency is only 0.5dB from the CRB(Cramer-Rao Bound).Compared with other improved Rife algorithms,the new approach can significantly reduce the required computation under the premise of guaranteeing the performance of estimation,be propitious to the engineering.更多还原