软件无线电分层体系结构

介绍一种用来设计可重构平台的软件无线电体系结构,叫做软件无线电分层体系结构。这种结构引入了软件无线电的所有特征,并使复杂的问题简单化,是一个开放的、统一的、正式的体系结构,适合于软件无线电系统的标准化,有利于软件无线电体系结构的统一。     

软件无线电的体系结构

在介绍了软件无线电基本概念基础上,说明了软件无线电出现和发展的必然性和意义。然后,结合软件无线电体系结构的定义、功能实现方式以及理想的体系结构的硬件、软件和接口,提出了软件无线电体系结构的发展方向和对移动通信的影响。     

软件无线电的体系结构

从硬件平台和软件结构两个方面介绍了软件无线电的体系结构，并介绍了软件无线电的发展方向。     

在移动通讯测试领域中软件无线电技术的运用

移动通讯频谱资源是一个很难解决的问题,无线电技术被认为是解决频谱利用率低下和频谱资源紧张的一种有效途径。软件无线电技术及其测试技术的发展,使得通信测试设备拥有模块化、开放式、易扩展和重用可编程的硬件平台,有助于提高测试效率。文章主要针对软件无线电技术的发展状况和软件无线电的体系结构等理论进行分析,并对软件无线电的关键技术作了重点分析,针对软件无线电技术在移动通讯测试领域中的应用作了具体而详细的分析。     

软件无线电及其实现中的技术课题

详细阐述了软件无线电的概念、体系结构．并在此基础上分析了在软件无线电实现中要解决的技术课题，最后讨论了软件无线电的应用前景。     

软件无线电与移动通信

本文叙述了软件无线电的定义和体系结构，给出软件无线电的横向和纵向分层组成，以及表征软件无线电的重要参数。讨论了移动通信应用软件无线电技术的重要问题，包括硬件平台与SDR实现、复杂度与成本权衡等。     

数字中频滤波技术及其在软件无线电中的应用

本文首先介绍了软件无线电的基本体系结构以及其中数字中频滤波(IF)的重要作用,具体说明了数字滤波器的实现,然后针对软件无线电所处理信号的不同特点着重分析了实现其下变频的数字中频滤波方法。     

虚拟无线电技术及其应用

近年来软件无线电技术已成为无线电通信领域的技术热点。文中首先介绍软件无线电的基本概念、体系结构及其关键技术 ,在此基础上着重探讨软件无线电的发展新趋势虚拟无线电 (virtualradio)技术 ,通过与传统软件无线电技术的比较 ,分析其优势所在 ,并以SpectrumWare系统为例 ,提出了采用虚拟无线电技术实现GSM收发信基站的软件模块设计方法。     

无线通信的新热点——软件无线电

本文在分析目前军用无线电现状的基础上，提出了软件无线电的概念。在简要介绍了美军ＳＰＥＡＫＥＡＳＹ计划及目前软件无线电发展现状后，着重分析了软件无线电台的主要特征和体系结构。最后，进一步指出了目前实现软件无线电方面存在的问题。     

基于SCA规范的软件无线电系统设计

软件通信体系结构(SCA)是软件无线电系统开发的技术规范,它能有效解决基于SCA规范的不同软件无线电系统的软件可移植性和可重用性问题。本文主要阐述了SCA规范的基本内容,从硬件体系结构、软件体系结构和安全体系结构三个方面对软件无线电系统设计所遵循的规范进行了说明,从而为软件无线电系统的开发奠定了基础。     

Software radio architecture: a mathematical perspective

As the software radio makes its transition from research to practice, it becomes increasingly important to establish provable properties of the software radio architecture on which product developers and service providers can base technology insertion decisions. Establishing provable properties requires a mathematical perspective on the software radio architecture. This paper contributes to that perspective by critically reviewing the fundamental concept of the software radio, using mathematical models to characterize this rapidly emerging technology in the context of similar technologies like programmable digital radios. The software radio delivers dynamically defined services through programmable processing capacity that has the mathematical structure of the Turing machine. The bounded recursive functions, a subset of the total recursive functions, are shown to be the largest class of Turing-computable functions for which software radios exhibit provable stability in plug-and-play scenarios. Understanding the topological properties of the software radio architecture promotes plug-and-play applications and cost-effective reuse. Analysis of these topological properties yields a layered distributed virtual machine reference model and a set of architecture design principles for the software radio. These criteria may be useful in defining interfaces among hardware, middleware, and higher level software components that are needed for cost-effective software reuse     

Open Architecture Standard for NASA's Software-Defined Space Telecommunications Radio Systems

NASA is developing an architecture standard for software-defined radios used in space- and ground-based platforms to enable commonality among radio developments to enhance capability and services while reducing mission and programmatic risk. Transceivers (or transponders) with functionality primarily defined in software (e.g., firmware) have the ability to change their functional behavior through software alone. This radio architecture standard offers value by employing common waveform software interfaces, method of instantiation, operation, and testing among different compliant hardware and software products. These common interfaces within the architecture abstract application software from the underlying hardware to enable technology insertion independently at either the software or hardware layer. This paper presents the initial Space Telecommunications Radio System architecture for NASA missions to provide the desired software abstraction and flexibility while minimizing the resources necessary to support the architecture.     

A soft radio architecture for reconfigurable platforms

While many soft/software radio architectures have been suggested and implemented, there remains a lack of a formal design methodology that can be used to design and implement these radios. This article presents a unified architecture for the design of soft radios on a reconfigurable platform called the layered radio architecture. The layered architecture makes it possible to incorporate all of the features of a software radio while minimizing complexity issues. The layered architecture also enables a methodology for incorporating changes and updates into the system. An example implementation of the layered architecture on actual hardware is presented     

FPGA在软件无线电中的应用

软件无线电由于其极大的灵活性和集成性而非常适合作为移动通信的硬件平台,本文分析了软件无线电的结构和目前所遇到的技术挑战,指出了FPGA在软件无线电领域中的广阔应用前景。     

基于SCA的软件无线电SoPC设计

软件通信体系架构为实现具有开放性、标准化、模块化的通用软件无线电平台提供了规范。为了实现无线通信系统的小型化,采用软硬件协同设计的方法构建了基于SCA的软件无线电SoPC系统,该系统实现了波形组件的动态配置和部署,以及硬件组件的部分重构。同时它具有效率高,体积小,功耗低,功能强的优点,具有很好的应用前景。     

CORBA delays in a software-defined radio

The increasing processing power available in single-chip processors is the technical enabler for a software-defined radio. Previous efforts have defined a software radio architecture based on POSIX operating systems and CORBA. Although this approach successfully hides details of the underlying hardware from the application software, it raises questions concerning the delays introduced by CORBA and their impact on the radio's real-time operation. Measurements performed on a software radio indicate that CORBA-related delays are tolerable, even in a nonoptimized implementation     

The software radio concept

Since early 1980 an exponential blowup of cellular mobile systems has been observed, which has produced, all over the world, the definition of a plethora of analog and digital standards. In 2000 the industrial competition between Asia, Europe, and America promises a very difficult path toward the definition of a unique standard for future mobile systems, although market analyses underline the trading benefits of a common worldwide standard. It is therefore in this field that the software radio concept is emerging as a potential pragmatic solution: a software implementation of the user terminal able to dynamically adapt to the radio environment in which it is, time by time, located. In fact, the term software radio stands for radio functionalities defined by software, meaning the possibility to define by software the typical functionality of a radio interface, usually implemented in TX and RX equipment by dedicated hardware. The presence of the software defining the radio interface necessarily implies the use of DSPs to replace dedicated hardware, to execute, in real time, the necessary software. In this article objectives, advantages, problem areas, and technological challenges of software radio are addressed. In particular, SW radio transceiver architecture, possible SW implementation, and its download are analyzed     

软件无线电体系结构中的总线瓶颈及其解决方案

软件无线电系统中的模块化、数字式通硬件平台是进行实时信息处理的并行处理系统，其总体性能取决于系统中信号处理，信息传递和存储能力的优化设计。本文讨论在基于总线的软件无线电体系结构中的总线瓶颈及其解决方案。     

软件无线电实现方案研究

本文提出了一种基于交换网络的软件无线电的硬件平台 ,同时完成了一个实验平台 ,证明了上述思路是可行的。还介绍了在实验平台中所采用的一种高效率的内插算法     

基于交换网络分层结构的软件无线电方案

提出的软件无线电方案采用了基于交换网络的分层结构,这种结构使得硬件的配置、可重配置和模块的扩展变得开放、灵活。最后,通过具体的智能天线下行波束形成方案验证这一基于交换网络分层结构的思想。