基于双门限判决修正Rife算法的正弦信号频率估计  

Frequency Estimation of Sinusoid Based on the Dual-Threshold Decision Modified Rife Algorithm

作　　者：崔诵祺[1] 王爱华[1] 汤乐[1] 杨丽丽 CUI Song-qi WANG Ai-hua TANG Le YANG Li-li(School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China China Patent Development Corporation, Beijing 100088, China)

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]中国专利技术开发公司,北京100088

出　　处：《北京理工大学学报》2017年第3期292-296,303,共6页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2012AA01A505);国家自然科学基金资助项目(61271258;61301089)

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.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.

关 键 词：Rife算法 正弦信号 频率估计 

分 类 号：TN911[电子电信—通信与信息系统]