自干扰

Chapter 2 discusses the function of optimum array based on the minimum meansquared error principle in CDMA system, the method of produce the reference signal, and proved whether the reference signal is the correspond PN code sequence or respread signal, the result of the array's weight converge can converge the same optimum weight under the condition that the PN sequence in a bit of data is long enough. In this chapter, we finally get the beam pattern and the correlate bit error rate after converge when several CDMA signal arrives in different direction.

本文的主要贡献及创新之处是：首次从理论上探讨了基于最小均方误差准则的最优天线阵在CDMA系统中的多址干扰抑制性能及其参考信号的产生方法，证明了采用有用信号相应的扩频码作为参考信号与采用将解扩信息与扩频码进行重扩频后的信号作为参考信号来调节自适应天线的权值均可使权值收敛于同一最优解。

An adaptive conjugate gradient algorithm based on subband decompsition structure was proposed for acoustic echo cancellation in communication systems.

针对通信系统中的声学回声干扰问题，研究了一种快速收敛和有效的自适应回声抵消算法。

An adaptive robust tracking problem is investigated when a discrete-time plant is subject to both unmodelled dynamics and unknown external disturbances.

摘要针对存在未知干扰和未建模动态等不确定性的系统的自适应鲁棒跟踪控制问题进行了探讨。

An adaptive robust tracking problem is investigated when a discrete-time plant is subject to both unmodelled dynamics and unknown external disturbances.

针对存在未知干扰和未建模动态等不确定性的系统的自适应鲁棒跟踪控制问题进行了探讨。

However, intermixing of component spectra cripples the ability of IR to study self-association system.

红外光谱本身具有的指认组分和反映组分结构的能力，在用于自聚集体系研究时，总是受到组分光谱相互叠加混淆的干扰和限制。

At first, setting up the arith relation between the signal input and the signal output of the generalized multi-carrier system of the Discrete Fourier Test spread-spectrum; then setting equilibria parameters of the frequency field equilibria subcarrier of the generalized multi-carrier system of the DFT spread-spectrum according to channel frequency response, channel noise variance and equilibria method; then calculating average power of useful signal, interferential average power between signals as well as noise variance of the generalized multi-carrier system receiving terminal of the DFT spread-spectrum according to the arith relation as well as the frequency field equilibria parameter, and recomputing available signal information noise ratio, so as to calculate the available signal information noise ratio of the generalized multi-carrier transmission system accurately, the method for estimating the available signal information noise ratio can be used for link self-adapting transmission solution of the generalized multi-carrier system based on Discrete Fourier Test spread-spectrum and radio material management.

一种DFT扩频的广义多载波系统的SINR估计方法，其通过首先建立所述离散傅立叶变换扩频的广义多载波传输系统的信号输入输出之间的数学关系，然后根据信道频率响应、信道噪声方差和均衡方法，设定所述DFT扩频的广义多载波传输系统的频域均衡子载波的均衡系数，再根据所述数学关系及所述频域均衡系数分别计算所述DFT扩频的广义多载波传输系统接收端有用信号的平均功率、信号间干扰的平均功率以及噪声方差，再计算有效信干噪比，如此以实现对广义多载波传输系统的有效信干噪比的准确计算，该有效信干噪比估计方法可用于基于离散傅立叶变换扩频的广义多载波传输系统的链路自适应传输方案和无线资源管理方面。

First state reconstruction techniques are used to transform the DC motor model into a cascaded structure and,then,nonlinear adaptive back-stepping controller is designed which is robust to the parameter uncertainties and load torque disturbance.

首先通过状态重构将直流电机系统模型转化为级联结构，其次考虑参数不确定及转矩干扰设计具有鲁棒性的自适应反向步进控制器。

The simulation results show that the ISI can be eliminated effectively with adaptable equalizers in baseband transmission ,and the digital communication system takes.

仿真结果表明，自适应均衡器能够有效地消除码间干扰，增强基带传输系统的传输特性。

In light of the characteristics of non-linearity,heavy lag behind,strong coupling, time change, heavy working environmental interference as well as stochastic disturbance and according to the self-adapting control theory the control device with PLC as its core element is used to realize the automatic and accurate control on the lift-up and fall-down of the electrode of electric arc furnace.

针对电弧炉的非线性、大滞后、强耦合、时变、工作环境及随机干扰较强的特点，应用自适应控制理论，采用PLC为核心控制部件，来实现电弧炉电极升降的自动准确地控制。

Finally, the adaptive WPT is applied to the localization and rejection of fast time-variant narrowband interference in direct sequence spread spectrum system.

提出了一种新的基于自适应小波包变换的二叉树结构算法及它在宽带系统中的窄带干扰定位和弃除技术中的应用。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失