调制的

This dissertation has studied various architectures of Sigma-Delta modulator systematically. According to power dissipation, stability and circuit implementation, a 2-2 cascade architecture is introduced. Oversampling ratio is 32. The attenuation factors of each integrator and interstage coefficients are obtained from behavioral simulation.

本论文系统地研究了∑A调制器的各种体系结构，根据功耗、稳定性以及电路实现等方面综合考虑，∑A调制器采用级联2—2结构，过采样比为32，并通过行为级仿真确定了积分器的增益衰减因子及级间耦合系数。

The dissertation also analyzes the relationship between isometric transformation groups and geometrically uniform constellations.

完整描述了能避免信道估计的酉空时调制USTM和差分空时调制DSTM在窄带MIMO系统中的设计原理。

It is necessary to study and improve the modulation characteristics of Liquid Crystal Modulator because of its wide application.

作为一种用途广泛的电光器件，研究并改善液晶调制器的调制特性具有重要意义。

In this system,it can acquisition realtime voice signal,process and use the design modem modulate signal.

在系统实现上，做到了实时语音信号的采集和处理并在所设计的调制解调器上进行调制。

The prototype of the modulator is introduced and the experimental results are given.

并且由固体调制器的基本框架图，设计了固体调制器的原型。

This thesis discusses the theory and design technique of the modulator. Several architectures of modulator and their characteristics are studied in it.

本文讨论了∑—Δ调制器的原理和设计方法，就不同结构的调制器进行了分析。

Like multicarrier modulation, the high rate data transmitted at first by serial-to-parallel convert, then the low rate data streams are spreaded spectrum by a set of orthogonal sequence.

相似于多载波调制，传输的高数据率首先进行串-并转换，然后对转换后的低数据流用正交序列进行扩频调制。

The phase modulation characteristics are analyzed by both theory and experiment.

通过理论分析和实验得出数据的方法研究了液晶空间光调制器的相位调制特性。

The results show that the quintic nonlinearity plays a role similar to the case of neglecting the group-velocity mismatch in modifying the modulation instability, namely, the positive and negative quintic nonlinearities can still enhance and weaken the modulation instability, respectively.

结果表明，五阶非线性对调制不稳定性的影响与忽略群速度失配的情形是类似的，即正负五阶非线性分别能够增强和减弱调制不稳定性。

The experimental results indicate that it is robust to the attack such as mp3 loss compression, low pass filter, resample and so on.

但由于采用扩频调制后，一个水印信息要用一个周期的伪随机序列调制，因此会增加嵌入的水印量。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。