水声信道的时变相位起伏使得实现可靠的相位跟踪比较困难, 从而造成基于相位检测的 水声通信接收机结构复杂。提出基于FSK 调制的直接序列扩频(DSSS2 FSK) 水声通信系统。-Underwater acoustic channel disguised bit of time to achieve reliable phase fluctuations make tracking more difficult, resulting in detection based on phase

Abstract: Randomized modulation is of increasing interest in power electronics and also holds promise for reducing filtering requirements in ac/ac, dc/dc converter application and reducing acoustic noise in motor drive applications. This paper

基于全相位频谱分析的相位差频谱校正法.PDF-Phase Difference Correcting Spectrum Method Based on All-phase Spectrum Analysis

巴特沃斯滤波器及切比雪夫滤波器简单分析波形输出的相位，幅度及频谱-The Battworth filter and Chebyshev filter simply analyze the phase, amplitude and spectrum of the waveform output