通信调制信号载波频率估计的HHT方法.pdf

皇王i坚耋．墼量耋邀 2005年增刊 ．一一 通信调制信号载波频率估计的HHT方法 陈玉平梅文博 (北京理工大学电子工程系北京 100081) 摘要：本文研究通信调制信号的载波频率估计问题，提出了一种新的对通信数字调制信号进行载波频率估计的方法。该方 法通过Hilbcn-Huang变换方法计算信号的边缘谱，估计载波的频率。对典型的六种数字调制信号进行了仿真试验，结果表 明，该方法在信噪比大于OdB时，能够有效地估计通信调制信号的载波频率。 关键字：载波频率估计Hilbert·Huang变换边缘谱数字调制信号 A Noval for Carrier Estimationof Algorithm Frequency CommunicationModulation Signals Using Transformation Hiibert-Huang Chen MeiWenbo Yuping Electronic Institute (Dept．of Engineering，BeijingofTechnology,Beijing100081，China) Abstract：Carrier estimationofcommunicationmodulationisstudiedinthis for frequency signals noval carder paper,Aalgorithm of estimation is methodestimatesthecarrier from signal the which frequency digital proposed．This frequencymarginalspectrum achieved onsix modulationtliedone．Thesimulation throughHilbert—Huang transformation．Experimentstypicaldigital signals resultsshow can thatthismethodestimatethecarrier ofcommunicationmoduitation whenSNRis frequency signals effectively aboveOdB． modulated Keywords：Carrierfrequency transformation；marginal signal． estimation；Mlben—Huang spectrum；digitally 频率作为载波频率，它对于