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Firstly, it discusses the principle of adaptive interference chancellor, including broad band signal and narrow band signal; Secondly, it analysises one common algorithm used in adaptive interference chancellor, that is, LMS algorithm and its anamorphosis algorithm especially normalized LMS algorithm pointing out their relationship. After then, the paper talks about the structure and reality of canceling broad band noise in narrow band signal and narrow band noise in broad band signal and gives it's result simulation analyzing the factors affecting the power of the algorithm. In the last party, it gives the hardware design and assembly language software design using TMS32OC3 1, including the result of simulating.

首先,本文讨论了自适应干扰对消的原理,并对窄带信号和宽带信号两种进行了分别分析;然后本文对自适应干扰对消中常用的算法—LMS算法进行了分析,同时也讨论了LMS算法的变形算法,尤其是归一化LMS算法,并指出了这些算法的相同和不同之处;此后,本文讨论了窄带信号中的宽带干扰对消和宽带信号中的窄带干扰对消的结构及实现方法并给出了住址的结果,分析了影响干扰对消效果的因素;在论文的最后,给出了用TMS320C31实现窄带信号中的宽带干扰对消的硬件设计和汇编程序设计,以及汇编语言程序的结果,并就此结果与高级语言程序的结果作了比较。

The performances of noise jamming, pulse jamming, shift-frequency jamming, range pull off jamming on pulse compression radar signals are analyzed in this paper, which include the linear frequency modulation signal, the binary phase-coded signal and the compound signal of LFM and BC.

针对线性调频信号,二相编码信号以及由线性调频信号和二相编码信号构成的混合信号这几种脉冲压缩雷达信号,分析了噪声干扰、脉冲干扰、移频干扰和距离拖引干扰对它们的干扰性能,并给出了仿真模型和仿真结果

The following text will briefly introduce common interferences from adjacent satellite , cross-polarization and inter-modulation , and the carrier interference caused by uplink device , and also launched unauthorized even intrusively .

下文将粗略介绍常见的邻星干扰、反极化干扰、互调干扰、由上行设备引起的载波干扰、以及非授权使用和恶意干扰等星上干扰,并对相关的分析处理方法作经验探讨。

A simplified signal model of digitalized receiver and the signal model of interference, such as tone interference, autoregressive interference and digital interference, are provided. And it is analyzed in detail the capability of DSSS communication systems in suppressing broadband Gaussian interference, single tone interference and partial band interference.

给出简化的接收机信号模型和常用的窄带干扰模型(音调干扰、AR干扰、低速数字干扰等),分析了DSSS技术对阻塞高斯干扰、单音干扰、部分频带干扰等的抑制性能。

Firstly, the performances of linear and nonlinear algorithms based on interference estimator/subtracter are compared. Secondly, a novel interference suppression algorithm based on subspace tracking is proposed for the tone interference model. Finally, the stability performance of the transform domain normalized least mean square adaptively implementing structure of minimum bit error ratio receiver is analyzed.

总结和比较了基于AR干扰模型的各种干扰估计抵消算法性能;从音调干扰模型出发,提出一种新的基于子空间跟踪的时域干扰抑制技术;讨论了基于低速数字干扰等效"虚拟"多用户干扰模型的最小误码率接收机的变换域归一化最小均方自适应实现结构及其稳态性能。

This dissertation comprehensibly researches the performance of hybrid DS/FH spread spectrum communication systems, operating in a combined additive white gaussian noise , multiple access interference, and channel fading, particularly operating in hostile interference (partial band interference and multitone jamming). At the same time, the dissertation investigates performance of forward error correction coding and diversity technology against channel noise.

本文以此为背景,较为详细地研究了在信道中出现各种噪声干扰(高斯白噪声、多址干扰和信道衰落),特别是敌方的人为干扰(部分带宽噪声干扰和部分带宽多频干扰)时,混合DS/FH扩频通信系统的性能,以及前向纠错信道编码和分集技术对混合扩频通信系统信道出现噪声干扰时系统性能的改进情况。

We found evidence for interference (i. e., longer response latencies and more errors) for both form-related (orthographically similar to the true translation) and meaning-related (similar in meaning to the true translation) words relative to unrelated control words.

结果发现,在语义干扰条件和正字法干扰条件下,被试无论在反应时还是错误率上,都大大差于无关控制条件:熟练双语者,语义干扰条件下的反应要显著慢于正字法干扰条件。

Because the biggest characteristic of ECG and pulse signals is very weak, vulnerably to external signal interference, such interference, mainly caused by mobile electrode baseline drift (generally less than 1Hz), power-frequency interference (50Hz), EMG Interference.

由于心电信号和脉搏信号最大特点就是信号十分微弱,容易受到外部信号的干扰,这些干扰主要来(来源:7bABC论文网www.abclunwen.com)自电极移动引起基线漂移(一般小于1Hz),电源工频干扰(50Hz),肌电干扰。

In order to improve the inspection technologies of satellite interference, 5 kinds of technologies of satellite interference and integrated judgement-spectrum analysis, helix inspection, PID, S/N and signal vector were put forward. The automatic inspection system of interference of satellite TV has been built according to these inspected technologies and technology of network. The system adopts comparison of spectrum template, calibration of beaconing, mode identification, telemetering pick-up technology and improve the inspection technology of satellite interference. The alarm limits haw been defined through a lot of emulational tests, so that the system become feasible. The system has a good effect and makes up the blank of inspection technologies of interference in our country to some extent.

为了提高卫星干扰监测水平,提出了频谱监测、螺流监测、PID监测、S/N监测和信号矢量图监测等五种监测技术和干扰综合判断方法:根据这些技术手段和方法,并利用计算机网络技术,建立了卫星电视干扰信号自动监测系统;该系统利用网络化设计,采用频谱模板比对,卫星信标电平校准、信号模式识别、卫星遥测信号提取等技术,提高了卫星干扰监测的准确度和自动化程度;通过大最的仿真测试,设定告警门限,使系统的漏警率和误警率达到实用要求;该系统应用于干扰监测工作中,起到了很好的效果;在一定程度上弥补了国内通信干扰监测的空白。

Combined with the traditional radar jamming, this article analyzes the smart noise jamming and cites four smart noise jamming patterns: coherent in-pulse suppressing jamming, intensive false targets with frequency-shift, front edge replication jamming and equal-partition pulse sampling jamming.

本文结合传统的雷达干扰方法,分析了当前热门的灵巧噪声干扰,选取了四种灵巧噪声干扰样式:相参脉内压制干扰、基于移频的密集假目标干扰、前沿复制干扰、脉内等间隔取样干扰。

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Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。