The stability of micro-birefringence optical path difference measuring system based on electro-optic modulation method is studied 提出用旋转半波片反射法测量半封闭玻璃制品应力,探讨以电光调制法为基础的微双折射光程差测量系统的稳定性。
In chapter 3, on the basis of analyzing and comparing with some common pwm modulation methods, a step reference waveform modulation strategy is proposed 在第三章中,在对一些常用的pwm调制方法进行分析比较的基础上,着重介绍了阶梯波调制pwm技术。
A novel modulation method for cascaded multicell inverter with separated dc sources is presented in this paper to balance the unequal power distribution among different invert cells 摘要针对带独立直流源的级联型多电平逆变器各逆变单元间应力分配不均衡提出了一种新的调制方法。
Secondly, the paper perform a review of the most common modulation methods used in such systems, including ook, ppm, overlapping-ppm, a hybrid modulation scheme called appm 其次,本文对常用的几种调制解调方式进行了研究。包括ook、ppm、交叠调制oppm、混和调制方案appm,得到了关于符号误码率和信道容量的表达式。
The paper presents a fingerprinting modulation method based on vector-tree structure . comparing to traditional and-acc method, it can improve system performance in resistance against the attack of colluders 摘要提出一种基于矢量树结构的指纹编码调制,相对于传统的and-acc调制方式来说,其有效地增强了系统抗共谋攻击的能力。
The system employs multicarrier modulation ( mcm ) technique as the modulation method, and linear frequency modulation ( lfm ) signal as the synchronization signal and digital signal processor ( dsp ) as the hardware's core chip 该系统选用多载波调制技术进行调制,选用线性调频信号为其同步信号,选择数字信号处理器为硬件核心芯片。
3 using current injecting frequency modulation method and modulating sine wave around the resonator point, the lock-in phenomena is observed in a comparatively short period of time . this has achieved the basic goal for a closed loop r-fog 3、采用电流注入法,在谐振点附近进行正弦调制,实现了对谐振点的短时间锁定,达到了闭环光纤陀螺设计的首要基本要求。
This thesis first studied the communication system with detailed theories so that to choose the appropriate method of modulation and demodulation . n / 4dqpsk is a kind of modulation method which is appropriate to transfer in the attenuated channel /4dqpsk是一种比较适合在衰落信道中传输的调制方式,它不需要提取相干载波,因而不存在相位模糊、环路跳周等问题。
And with the pulse width modulation method, linearized the electrostatic force producer . it deeply analyzed the speciality of the electrostatic force closed-loop plan, and worked out the system parameters from automatic control theory and simulation 深入分析了静电式脉宽调制闭环方案的系统特性,结合自控原理理论和仿真分析对静电式脉宽调制闭环系统参数进行设计计算。
By the comparative use of chaotic signal for encoding and decoding, this paper illuminates the modulation method for larger amplitude information signal, and proposes the chaotic modulation communication method for larger larger information signal 摘要通过对比利用混沌信号进行编码和解码调制的方式,说明了适合大强度信号的调制方式,提出了适合较大强度信号的混沌调制通讯方法。