调制解调器的已调信号通过VHF通信系统进行二次调制，通过VHF通信系统的信道实现数据通信。
Modem signals will be transferred through the VHF communications system has a second modulation, through VHF communication system access to data communications.
信号进行二次调制，引入两个参考信号分别对信号进行互相关处理，从而能抑制与参考信号同频率的干扰。
Modulating twice the signal to be tested and cross correlating it in turn with two reference signals, we are able to do so.
设计出了二次调制系统：采用连续可变斜率增量调制（CV SD）实现模拟话音信号与数字编码的转换，采用二进制相对相移键控（2DPSK）作为数字调制方式。
A twice modulation is designed:, CVSD was adopted to realize conversion between analog and digital voice signals, 2DPSK was used as the digital modulation mode.
本文提出了一种线性相位精确重建余弦调制滤波器组的二次型约束设计公式。
We propose the quadratic constrained formulas for the design of linear phase cosine modulated paraunitary filter banks given in references .
本文将非线性调频技术引入引信探测体制中，利用线性调频波作为调制信号对射频信号进行二次调频。
In this paper, we present a new frequency modulation function on the basis of features of traditional non-linear frequency modulation signal.
给出用光谱分辨的二次谐波自相关法测量输出脉冲的结果，证实在锁模脉冲中已发生频率调制。
The results of the spectrum-resolved SHG correlation measurements of the mode-locked pulses also are presented, which confirmed the presence of frequency chirping in the pulses.
偶次分谐波混频可有效地抑制载波泄漏、二次混频失真及本振噪声，是提高调制器精确度及直接解调器动态范围的有效技术。
In this paper, we discuss even subharmonic mixing technique which can suppress carrier leakage in microwave direct modulator, or suppress IM2…
本文详细分析了在异步调制下，直流电压的二次脉动对逆变器输出电流以及电机转矩的影响。
This paper analyses the influence of the rippled DC voltage to the output voltage of the inverter and the motors.
提出一种电网电压不对称情况下抑制三相脉宽调制(PWM)电流型变流器(CSC)直流输出电流二次谐波、减少网侧电流低次谐波的控制方法。
This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
提出一种电网电压不对称情况下抑制三相脉宽调制(PWM)电流型变流器(CSC)直流输出电流二次谐波、减少网侧电流低次谐波的控制方法。
This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
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