查询词典 frequency modulation

Based on the characters of long rang underwater acoustic channels and MFSK modulation, a new Frequency Group Coding method is proposed in this paper.

本文针对远程水下信道和MFSK调制的特点，提出了一种新的频率分组编码方法。

Focusing on the problem that existing Space-Time Frequency-Shift Keying incurs a spectral efficiency loss, this paper proposes a novel ST-FSK based on Hadamard matrix modulation coined as HST-FSK.

摘要针对现有的空时频移键控频谱利用率低的缺陷，该文提出了一种基于Hadamard矩阵调制的空时频移键控方案。

By utilizing the cross gain modulation effect and the period 1 oscillation harmonic frequency locked in an optically injected semiconductor laser , we can extract the wavelength conversional individual channel optical clock from the optical time division multiplexing OTDM signal .

光注入半导体激光器会产生非线性单周期振荡特性，利用交叉增益调制效应及对单周期振荡的微波锁频效应，可从光时分复用信号中提取出波长转换的分路光时钟。

Frequency modulation and amplitude compensation of interruptedly received LFM signals are studied to precede a false target group based on interrupted T/R jamming system.

摘要该文基于间歇收发干扰体制，研究了通过对间歇采样LFM信号的频率调制和幅度补偿，产生导前假目标群问题。

The control signals of invertor are produced by space vector modulation to achieve a small torque ripple and constant switch frequency.

以空间矢量调制方法来获得逆变器的开关信号，实现了小的转矩脉动和恒定的开关频率。

Laser printers by laser, acousto-optic modulator, high-frequency drivers, scanners, desynchronizers and acoustooptic, etc., it is to interface circuits for the binary lattice information modulation in laser beam, scan-to-peripherin-seadweed.

激平打印机是由激平器、声平调制器、高频驱动、扫描器、同步器及平偏转器等构不败，其功用是把接口电路送来的二进制不面阵陈闻调制在激平束上，之后扫描到感平体上。

The task of this project is to design a hardware platform for radar video simulation and calculate the pulse-compression video signal of linear frequency modulation radar system.

在深入分析了线性调频脉冲压缩信号产生过程和特性的基础上，结合16位定点DSP——TMS320C5402的硬件结构和指令系统的特点，编写了定点DSP程序，并对程序的计算量和计算结果进行了分析，表明算法的速度和精度都可以满足系统的要求。

The polarization and magnetic rotation in highly nonlinear photonic crystal fibers were investigated by frequency multiplication method based on the principle of magneto-optical modulation, joining with Lissajous figure method, and by investigating temperature characteristic and spectral characteristic.

运用基于磁光调制原理的倍频法，结合利萨如图形方法，并通过温度特性和光谱特性的考查，对高非线性光子晶体光纤的偏振效应、磁旋光效应进行了实验研究。

The polarization and magnetic rotation in some visible step-index single-mode fibers were investigated by frequency multiplication method based on the principle of magneto-optical modulation and with Lissajous figure method.

运用基于磁光调制原理的倍频法，并结合利萨如图形方法，对几种可见波段单模阶跃折射率光纤的偏振效应、磁(来源：A25BC论文网www.abclunwen.com)旋光效应做了考查和研究。

A method of representing data in magnetizable surface storage; for example,"modified frequency modulation".

在磁表面存储技术中一种表示数据的方法，例如改进型调频制。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。