四相相移调制是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控。
Quadrature phase shift carrier modulation is used to represent the four different phase inputs of digital information, is quaternary phase shift keying.
研究基于小波变换有效提取信号瞬变特性的功能，对数字调制移相键控(PSK)信号进行符号速率估计。
Studies the function of wavelet transform (WT) that can effectively distill the transient characteristics of digital signals to estimate the symbol rate of PSK signals.
数字调制解调技术在数字通信中占有非常重要的地位，常用的数字调制有：移频键控(FSK)和移相键控(PS K)等。
Digital mod technology in the digital communication occupies a very important position, commonly used digital modulation are: frequency shift keying (FSK) and phase-shift keying (PSK), and so on.
数字调制解调技术在数字通信中占有非常重要的地位，常用的数字调制有：移频键控(FSK)和移相键控(PS K)等。
Digital mod technology in the digital communication occupies a very important position, commonly used digital modulation are: frequency shift keying (FSK) and phase-shift keying (PSK), and so on.
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