无线电技术

本论文对软件无线电技术的理论与实现进行了研究。

This paper research the SDR technology from theory to realization .

应用软件无线电技术，一个移动终端可以在不同的系统间畅通无阻地使用。

SDR technology can enable a mobile terminal to be used in many different systems without any resistance .

认知无线电技术认知和语言Alzheimer病认知障碍和非认知功能改变的相关性

Relationship between Cognitive Disturbances and Non-Cognitive Function in Alzheimer ′ s Disease

近年来，随着频谱的竞争不断升温，使得认知无线电技术（CR：Cognitiveradio）已经成为当前的研究热点。

Recently , intense competition for spectrum usage has arisen , and Cognitive Radio ( CR ) has become a hot spot .

本课题主要研究基于PCI总线和软件无线电技术的中频数字化接收机。

This paper studied teh IF digital receiver based on PCI Bus and Software Radio .

先进的物理层技术，例如多输入多输出（MultipleInputMultipleOutput，MIMO）技术和认知无线电技术能提高系统的传输能力。

Advanced physical layer technologies , such as MIMO ( Multiple-Input Multiple-Output ) technology and cognitive radio technology , can increase the transmission capacity of the system .

基于软件无线电技术的GPS信号软件接收机，是近年来GPS技术研究的一个热点，也是GPS用户设备的一个重要发展方向。

The software-based GPS receivers based on the software radio technique are both hot point investigated and developing direction of current GPS receivers in the near years .

针对新概念武器弹药的发展要求，采用DSP、FPGA、卡尔曼滤波与软件无线电技术，解决实时性、通信等方面的难题，提高了导航能力和引战系统的性能。

The capability of navigation and Fuze & battle effectiveness is greatly enhanced with the technologies of DSP , FPGA , Kalman filtering algorithm and software radio .

超宽带（UWB）技术是目前最先进的无线通信技术，被认为是无线电技术的革命性进展。

UWB is the most advanced wireless communication technology at present , which is considered as revolutionary evolvement of radio technology .

基于软件无线电技术的ad-hoc网络路由协议ZRP的研究

The Research of Ad-hoc Network Routing Protocol ZRP Based on Software Radio

超宽带（UWB）技术是移动通信前沿技术，其被视为无线电技术的革命性进展。

Ultra-wide band ( UWB ) technology is the forefront technology of mobile communication technology , which is considered revolutionary advances in radio technology .

为了较好地解决软件无线电技术应用中任意采样率转换的问题，本文引入了时变CIC滤波器。

To solve arbitrary sampling rate conversion problem in software radio system , this paper presents a time-varying CIC filter .

随着现代DSP、FPGA等数字芯片的信号处理能力不断提高，基于软件无线电技术的现代通信与信息处理系统也得到了更为广泛的应用。

With the development of modern digital signal processing capabilities , such as DSP and FPGA chips , modern communications and information processing systems which base on software radio technology have also been used widely .

软件无线电技术以其开放性结构和全面可编程性在通信领域中获得了应用，其信号处理采用多DSP和FPGA结合的设计方法。

Software radio technology has found an increasingly wide application in communication field because of its open structure and comprehensive programmability . Its signal processing usually uses the design method which combines DSP and FPGA .

认知无线电技术中认知用户（也称CR用户）对周围无线频谱环境准确、快速的检测，即频谱感知，是提高其频谱利用率、保护授权用户免受干扰的重要前提和核心技术。

CR technology can sense the around wireless environment accurately and rapidly . Spectrum sensing is the important precondition and key technology to improve CR users ' spectrum utilization and protect primary users from interruption .

模拟前端的高速信号采样是软件无线电技术的基础，同时宽带高速速率的传输要求使得OFDM技术成为新一代数字移动通信的核心技术。

One foundation of SDR is high-speed signal sampling in analog front end . Also the demand of broadband high-speed transmission makes OFDM a core technology for new generation digital mobile communication systems .

在宽带通信中，软件无线电技术应用中的一个主要问题是后端处理的信号数据率太高，一般的DSP信号处理速率达不到这样的要求。

In broad band communication , there is a key problem of soft radio , the rate of data need for processing is too high , and currently DSP can 't do with so high rate data immediately .

文章提出了采用最小频移键控（MSK）技术与调频超短波无线电技术相结合传输信号的方法。

This paper puts forward the signals transmission method combining the MSK technique with the radio technique of frequency modulated ultra short waves .

为了将软件无线电技术应用于全球定位系统GPS（Globalpositioningsystem）接收机，提出了一种符合目前硬件技术水平的软件GPS接收机设计架构；

The design architecture of the software GPS ( global positioning system ) receiver in accordance with the current development level of the involved hardware technology was proposed , in order to develop the software radio technology application to designing and performing the GPS receiver .

在IEEE1394b基础上，家庭网络无线系统引入频谱利用率高效的超宽带（UWB）脉冲无线电技术，可提供具有灵活性和移动性的宽带无线接入。

Based on IEEE 1394b , home wireless networks adopt the ultra wide band ( UWB ) or impulse radio to achieve high spectral efficiency and to offer flexibility for mobile broadband wireless access .

随着软件无线电技术的发展，使信号的采样频率越来越高，而在高采样率的条件下，采用常规的方法进行窄带FIR滤波器的设计是不可能的。

With the rapid development of software radio techniques , the sampling rate is becoming high . On the condition of high sampling rate , the design of narrow band FIR digital filters by usual ways is impossible .

基于认知无线电技术，Device-to-Device（D2D）通信技术得到了提出和发展。

Based on CR technology , Device-to-Device ( D2D ) communication technology is proposed .

本论文以软件无线电技术为依据，参考数字通信技术，数字信号处理技术与EDA应用技术，完成了一新型接收机的基带解调系统的设计与研究工作。

This thesis is based on software radio technology , also refers to digital communication system , digital signal processing technology and EDA technology . a new type of receiver baseband demodulation system of design .

融合认知无线电技术和adhoc网络技术于一体的认知无线电adhoc网络（CRAHNs）是目前认知无线电领域的研究热点，CRAHNs网络与现有的移动通信网络结合，可以为用户提供宽带无线多媒体业务。

At present , Cognitive Radio Ad Hoc Networks ( CRAHNs ), which combine Cognitive Radio technology and Ad Hoc network technology together , is the research focus in Cognitive Radio area .

OFDM技术与认知无线电技术的结合，可以优势互补，相得益彰，构成频率捷变的传输系统。

OFDM technology is suitable for multipath propagation of wireless high-speed data transmission in mobile communication , the combination of OFDM technology and cognitive radio technology makes the two technologies complement each other , both constitute the transmission system of frequency agility .

而另一方面，超宽带与认知无线电技术相结合，即如何利用认知无线电技术实现UWB系统灵活的频谱共享和系统共存性正是当前研究的热点课题。

On the other side , UWB system combined with cognitive radio technology which makes use of cognitive virtue to adopt flexible spectrum sharing strategy between UWB system and other narrow bandwidth system has been becoming a more and more hot topic .

随着3G技术不断成熟，国际电信联盟研究制订第四代移动通信标准，在4G众多关键技术之中，软件无线电技术是通向未来4G的桥梁。

With 3G technology continues to mature , the International Telecommunication Union has begun to study the formulation of the fourth generation mobile communications standard , In many key 4G technologies , software radio technology is a bridge to the future .

超宽带（UWB）技术是无线电技术的革命性进展，具有传输速率高、功耗小、抗多径能力强等优点，被广泛应用于军事、民用的各个领域。

Ultra-wideband ( UWB ) technique is considered as a revolutionary breakthrough of wireless communication . It has high transmission rate , low power consumption and anti-multipath and so on , which makes that it has been applied in military affairs and civil fields .

目前对于超宽带脉冲无线电技术的研究还存在许多的问题，由于室内密集多径的环境影响，信号的能量被扩散开，传统的接收机结构和算法很难满足IR-UWB接收机的要求。

IR-UWB signal usually propagates in dense multipath environments , and the energy are spread out . The traditional structure and algorithm of the receiver can not fit the requirement of IR-UWB system .

在数字方案中，笔者结合软件无线电技术，通过使用对数放大检波器、A/D/A转换器以及FPGA软件实现了同样的中频放大、大动态范围的AGC控制、以及检波、视频信号处理等功能。

In the blue print of the digital , make sure of the logarithmic Amplifier , A / D / A converter and FPGA realize the IF amplifier , big dynamic range AGC , detect and video process same as that in the blue print of the analog .