两ADC异步采样信号频率无模糊估计算法  

Unambiguous Frequency Estimation Algorithm Based on Two Asynchronous ADCs

作　　者：胥嘉佳[1] 刘渝[1] 张刚兵[1] 胡国兵[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,南京210016

出　　处：《数据采集与处理》2010年第6期702-706,共5页Journal of Data Acquisition and Processing

摘　　要：提出了一种两ADC异步采样信号频率无模糊估计算法,处理宽带内的信号。该算法针对实信号处理,有效地避免了对宽带内的信号作正交变换这一难题。讨论了多分量信号的配对和频率解模糊问题,针对两分量信号的可能频率组合情况,分别给出了相应的配对方法。仿真结果表明,在低信噪比条件下本文的算法依然可以达到较高的正确配对率。本文算法简单,易于在FPGA等硬件上实现。Based on two asynchronous ADCs,an unambiguous frequency estimation algorithm is proposed to deal with signals in the wideband.This algorithm aims at real signal,so the problem of orthogonal transformation to signals in the wideband is abstained.The matching and the frequency ambiguity resolution about multi-component signal are discussed.And aimed at all the possible frequency combinations,proper matching solutions are also solved proposed.Simulation results show that a high correct-matching-rate is reached on the low signal noise ratio（SNR） by the algorithm.Moreover,the algorithm is simple enough to be easily realized in the hardware,such as FPGA.

关 键 词：欠采样 解模糊 信号配对 参数估计 

分 类 号：TN911.6[电子电信—通信与信息系统]