调制速率

该系统改进前面系统的调制速率，提高了传输速率。

The latter improved the modulation rate and the transmission rate .

研究了不同调制速率下的增益开关半导体激光器的最佳工作状态。

The optimal operating condition of gain switched semiconductor laser with different modulation rate is studied in this paper .

采用行波电极的M-Z型外调制器调制速率高，波长的啁啾噪声理论上为零，几乎不受光纤色散的限制，已成为高速长距离光纤传输系统必不可少的器件。

Especially , LiNbO_3 optical modulators , using M-Z waveguides and traveling-wave electrodes , are essential for high-speed and long-haul optical fiber transmission systems since the wavelength chirp is very small and the effect of the fiber dispersion is minimized .

数值模拟并证明了系统在较大的参数范围内都能实现同步，模拟了混沌调制速率200Mb/s和调制频率1·4GHz的保密通信应用。

Synchronization is achieved and is proved feasible numerically in larger parameter range . Secure communication applications are numerically simulated with chaotic modulations of 200 Mb / s rate and 1.4 GHz frequency .

用拍频法测量了自聚焦棒外腔激光器单纵模线宽与注入电流的关系曲线。并进行了调制速率100MHz正弦信号相干FSK调制一解调实验。

The stable beat patterns were obtained at several wavelength point The curve of the linewidth of graded index rod external cavity semiconductor laser vs the injection current was got by using beat method 100 MHz sinusoidal wave FSK modulation coherent transmission experiment was carried out .

光纤环形腔的腔长调制速率限和应用

Rate Limit of Loop Length Modulation for a Fiber Optic Ring Resonator and Its Applications

提高国产激光器组件直接调制速率与PIN－FET组件频响带宽的新技术

Novel Technology for Improvement of Modulation Speed of LD Module and Frequency Response Bandwidth of PIN-FET Module Made in China

随着单信道调制速率的增加，基于电信号处理控制模块的成本、复杂度都在不断增加。

With the increasing of the single channel modulation bit-rate , the cost and complexity of the electrical signal processing nodes are continuously expending .

实验结果表明：调制速率随自发极化强度的提高而增加，随转动粘滞系数、液晶薄膜厚度的提高而减慢。

The simulation results show that the response velocity quickens as spontaneous polarization increases and rotational viscosity as well as thickness of liquid crystal film decreases .

由于近似误码率公式存在误差，进而提出一种迭代算法，对各子流的功率进行微调，为用户的每个子流分配一种正交幅度调制速率，进一步提高频谱效率。

Furthermore , iterative substream power regulation arithmetic is proposed to compensate the error of the approximate bit error rate equation and allocate a kind of QAM rate for each data stream finally .

文章讨论了调制速率、读出光强比、晶体非线性耦合强度及初始光栅强度对增强速度及可获得的饱和衍射效率的影响。

The effects of the modulation rate , reading beams ′ intensity ratio , initial fixed grating strength and the crystals ′ nonlinear coupling strength on the enhancement speed and steady state diffraction efficiency are discussed .

仿真结果显示，该算法同时具有低误码率和高调制速率，因此能更好的保证通话的实时性。本文在最后设计并实现了端到端语音保密传输系统的仿真平台。

Simulation results show that this algorithm has lower bit error rate and higher modulation rate , so it can better ensure real time communication . Finally , This paper designs and implements a simulation platform of end-to-end voice secure communication system .

在光纤通信中广泛应用的垂直腔面发射激光器，以其单模特性好、阈值电流低、调制速率高等特点备受人们青睐，而在无线激光通信中的应用鲜有报导。

With its single mold characteristic , low threshold value of the electrical current and high modulation rate etc. , the Vertical Cavity Surface Emitting Laser has been extensively applied in the Fiber Optical Communication , but its application in Wireless Laser Communication is fresh .

分别数值模拟了该系统调制速率01和05Gbits混沌相位相移ONON键控通信，进行了混沌ONON键控调制速率分析，以及系统参数失配和系统抗噪声扰动的数值分析。

ON / ON chaos phase shift keying communications at bit rates of 0 1 and 0 5Gbit / s are numerically simulated . ON / ON chaos phase shift keying communication bit rate , the synchronization characterization and the system parameter mismatch are numerically analyzed , in particular .

模拟调制码速率、调制频偏都受变容二极管特性的限制，模拟调制功能单一、调制方式不可重组、单个系统调制频率不可改变，无法满足频率多变的需求；

The property of diode limits code rate as well as frequency - offset .

对声光调Q技术进行了分析，依据考虑Q调制之后的速率方程，研究了调Q激光器的优化问题。

Q-switching technique is studied based on the Q-switching rate equation . And the optimum problem of Q_Switched lasers is also studied .

分布反馈半导体激光器频率调制特性的速率方程分析

Rate equation analysis of FM response of distributed feedback ( DFB ) semiconductor laser

数字调制信号符号速率估计的依据是循环平稳理论，由于信号的符号速率就是其基本循环频率，因此可以通过提取信号非线性变换（例如循环自相关函数）的循环频率获知符号速率。

According to the theory of cyclostationary , symbol rate of some digital modulated signals , whose symbol rate gives out basic cyclic frequency , can be retrieved by estimating cyclic frequencies of signal 's nonlinear transform such as cyclic autocorrelation .

针对通常用来研究半导体激光器调制特性的速率方程中所采用的载流子寿命不变近似所存在的问题，重新对小信号调制下半导体激光器的速率方程组进行了线性化处理。

It is proved that , when the linearization method is applied to the time dependent rate equations used to study the modulation characteristic of a semiconductor laser at a small current signal , the constant carrier lifetime assumption is logically unreasonable .

位平面数据流经脉宽调制以逐行扫描速率驱动DMD显示。

Progressive scan-rate individual bit plane level digital data is then used to drive the DMD display using a Pulse Width Modulation ( PWM ) technique .

给出了一种改进的相位拟合载频估计方法；并给出了一种基于STFT时频能量分布和小波变换的码速率估计方法，解决了非协作通信条件下调制信号的码速率估计精度问题。

An improved method of phase fitting is proposed to estimate the carrier frequency , and a method based on STFT time-frequency energy distribution and wavelet analysis is given for estimating the symbol rate of modulation signal in non-cooperative communication environment .

然而由于60GHz系统中不同SINR门限值对应于不同的调制机制和传输速率，如果使用传统的非合作博弈方式，将使得所有用户的目标SINR维持在最小SINR门限值，导致网络吞吐量降低。

Each SINR threshold corresponds to a different modulation scheme and a different date rate . If we use the traditional non-cooperation game theory , all the users will keep their target SINR on the smallest SINR threshold , which will result in low network throughput .

通过改变物理层不同的调制方式实现传输速率控制。

The rate control is implemented via changing the modulation mode of physical layer .

该方案的显著特点是：调制方式、调制速率、中频频率皆可编程设置。

The outstanding features of this plan lie in the programmable modulate mode , modulate rate , IF rate and so on .

对这几种方案在瑞利衰落信道下的性能做了仿真，结果表明，多扩频增益方案与多信道方案性能接近，多调制方案在信息速率较高时，性能不如其它方案。

The simulated results show that the multi processing-gain scheme and the multi-channel scheme have almost the same performance , the performance of multi-modulation scheme is much worse than that of the other schemes for the users with high data rates .

对于接收到的信号，我们可以在没有其他先验知识的情况下估计出信号的信噪比、载波频率以及数字调制信号的码元速率，这些参数的提取有利于信号的调制识别。

Without prior information of signal , we can estimate some parameters of signal , such as signal to noise ratio ( SNR ), carrier frequency , and symbol rate of digital modulation signals . These parameters are advantaged to the modulation identification of communication signals .

理论上证明了正弦波调制下谐振峰振动现象的根本原因来自于PZT的调制速率过快，并据此研究了对陀螺输出的影响。

Theoretic analysis showed that , the root causes of resonance peaks vibration came from too fast PZT modulation rate , and then its impact on gyroscope were studied .

恒值单元根据负反馈控制原理，分别设计出功率和温度负反馈稳定电路，并针对温度-波长调制速度慢的缺点，引入了比例积分分离电路，有效加快了温度调制速率。

The design of the constant value unit accords to the negative feedback control theory , including power and temperature . Because the method of the temperature-wavelength modulation slowly , this paper uses the PI isolated circuit to speed up the rate of the temperature modulation effectively .

对调制识别预处理部分进行了研究，主要包括调制信号载波频率估计和数字调制信号符号速率估计两个部分，给出了实现预处理的几种常用方法。

Researched on the preprocessing part of modulation recognition , which mainly included the carrier frequency estimation and symbol rate estimation of digital modulation signals . Then several commonly used preprocessing methods are presented . 4 .