哈尔滨工程大学学报2009，Vol.30Issue(10)：1204-1208,5.DOI:10.3969/j.issn.1006-7043.2009.10.023
一种新的相位编码信号识别方法
A new recognition method for phase-shift keying signals
摘要
Abstract
A new phase-shift keying (PSK) signal recognition method was developed for low signal to noise ratio (SNR) environments, and it significantly decreases the calculations required in PSK signal recognition compared to existing methods. It first estimates the power spectrum of received signals and smoothes the results. Then it breaks the peaks of signal strength of the power spectrum into 3 dB slices in order to estimate carrier frequency. The received signal is down converted to the baseband using this estimated value. Finally, by considering the amplitudes of cumulative outputs of the baseband signal's imaginary parts and real parts to be complementary, and its inflexion point to be just a jump point in its phase, the PSK signal can be identified. This method is easy to calculate and implement, and can be applied in low SNR situations. Simulations showed the validity of the algorithm.关键词
相位编码信号/估计/累加/载频Key words
phase-shift keying/ recognition method/ cumulative/ carrier frequency分类
信息技术与安全科学引用本文复制引用
张雯雯,刘黎平..一种新的相位编码信号识别方法[J].哈尔滨工程大学学报,2009,30(10):1204-1208,5.基金项目
国家863项目和灾害天气国家重点实验室联合资助课题(40775021). （40775021）
