针对机载综合射频开放式系统架构,为了在软件综合层面上实现波形应用软件与具体平台的解耦,设计并实现了一种基于软件通信架构(Software Communication Architecture,SCA)的软件平台及其环境工具,解决了机载平台软件的分布式通信、资源...针对机载综合射频开放式系统架构,为了在软件综合层面上实现波形应用软件与具体平台的解耦,设计并实现了一种基于软件通信架构(Software Communication Architecture,SCA)的软件平台及其环境工具,解决了机载平台软件的分布式通信、资源调度管理、系统建模等技术问题,从而实现功能、应用和波形的组件化与动态重构。测试验证与工程应用情况表明,软件平台能够满足机载领域信号、信息处理强实时、高可用的应用需求,可有效提升综合射频系统软件开发质量与集成联试效率。展开更多
电子信息技术的高速发展促使装备系统综合化的需求越来越高。信息处理系统面临降功耗、提性能的要求,因此软件无线电技术得到了广泛应用。传统的软件通信体系结构(Software Communication Architecture,SCA)采用CORBA作为通信中间件,技...电子信息技术的高速发展促使装备系统综合化的需求越来越高。信息处理系统面临降功耗、提性能的要求,因此软件无线电技术得到了广泛应用。传统的软件通信体系结构(Software Communication Architecture,SCA)采用CORBA作为通信中间件,技术约束较多,实时性不强,通过分析特定的场景需求提出了轻量化的SCA软件架构,以及统一的通信中间件解决方案,对于提升信号处理的扩展性及综合化能力具有重要意义。展开更多
软件通信体系结构(Software Communication Architecture,SCA)标准是针对软件无线电设备缺乏互操作性而制定的标准,通过定义设备组件对底层的硬件进行屏蔽,实现上层应用与底层硬件相互分离,SCA符合性测试通过验证实际的应用是否符合SCA...软件通信体系结构(Software Communication Architecture,SCA)标准是针对软件无线电设备缺乏互操作性而制定的标准,通过定义设备组件对底层的硬件进行屏蔽,实现上层应用与底层硬件相互分离,SCA符合性测试通过验证实际的应用是否符合SCA标准中的定义,从而保证应用的跨平台性与通用性。当前国内外对SCA符合性测试的研究较少,测试过程中存在诸多问题,如各需求的测试之间存在依赖关系,某些需求测试的进行可能造成后续需求测试无法执行等,导致目前缺乏自动化的测试方法。针对这些问题,提出了一种测试序列自动生成方法,并基于扩展有限状态机的基本原理构造了SCA符合性测试模型。该模型能够直观地反映测试过程,分析测试中软件无线电系统存在的各种状态,判断测试用例执行序列的可行性,指导测试序列的构建,再结合基于集合的贪心算法对测试序列集进行优化。实验结果表明该方法能有效地保证测试覆盖度,并且提升测试效率。展开更多
针对软件通信架构(Software Communication Architecture,SCA)核心框架在机载领域臃肿和低效等问题,提出了一种面向机载软件无线电(Software Defined Radio,SDR)系统的SCA核心框架优化方案。首先,为使架构轻量高效,提出功能单元裁剪方法...针对软件通信架构(Software Communication Architecture,SCA)核心框架在机载领域臃肿和低效等问题,提出了一种面向机载软件无线电(Software Defined Radio,SDR)系统的SCA核心框架优化方案。首先,为使架构轻量高效,提出功能单元裁剪方法;其次,针对时间优化问题,分析了SCA的局限性,提出可灵活配置的加载流程优化技术,在兼容SCA规范的基础上可根据实际系统特点实施灵活的组件加载,充分发挥系统的并行加载潜力来缩短加载时间。实验结果表明,所提的优化技术能够有效提升SDR系统可用性,对面向机载SDR系统的SCA架构优化设计和应用具有较强的指导意义。展开更多
Software Defined Radio (SDR) architecture allows us to integrate different mobile technologies using common hardware but with different software modules. To achieve this, we need to keep the signal in digital form for...Software Defined Radio (SDR) architecture allows us to integrate different mobile technologies using common hardware but with different software modules. To achieve this, we need to keep the signal in digital form for as much portion of the circuitry as possible, so that the implementation could be carried out by programmable digital processors. For this purpose, the incoming radio frequency (RF) signal is down converted to baseband spectrum using band pass sampling method. Research works carried out so far in this field have developed a few algorithms for band pass sampling. But, these algorithms are not much useful for most of the mobile communication systems and they use complex methodology for computing the sampling frequency values. In order to use the SDR platform to integrate all current wireless technologies, an efficient, cost effective and less complex algorithm that can be labelled as universal band pass sampling algorithm is developed in this paper for multiple mobile systems. This algorithm is based on a novel idea of inserting guard bands between the signals which reduces the design complexities of perfect ADC and sharp cut off filters. Using this algorithm, valid sampling frequency ranges and corresponding IF values are calculated for down converting RF signals. The algorithm is tested for six RF signals of different wireless technologies which are integrated and simultaneously down converted using SDR based front end receiver and thus the system multiplies the base station capacity by a factor of six. The simulation results are obtained and shown in this paper which proves that the algorithm developed works well for most of the wireless technologies.展开更多
文摘针对机载综合射频开放式系统架构,为了在软件综合层面上实现波形应用软件与具体平台的解耦,设计并实现了一种基于软件通信架构(Software Communication Architecture,SCA)的软件平台及其环境工具,解决了机载平台软件的分布式通信、资源调度管理、系统建模等技术问题,从而实现功能、应用和波形的组件化与动态重构。测试验证与工程应用情况表明,软件平台能够满足机载领域信号、信息处理强实时、高可用的应用需求,可有效提升综合射频系统软件开发质量与集成联试效率。
文摘电子信息技术的高速发展促使装备系统综合化的需求越来越高。信息处理系统面临降功耗、提性能的要求,因此软件无线电技术得到了广泛应用。传统的软件通信体系结构(Software Communication Architecture,SCA)采用CORBA作为通信中间件,技术约束较多,实时性不强,通过分析特定的场景需求提出了轻量化的SCA软件架构,以及统一的通信中间件解决方案,对于提升信号处理的扩展性及综合化能力具有重要意义。
文摘软件通信体系结构(Software Communication Architecture,SCA)标准是针对软件无线电设备缺乏互操作性而制定的标准,通过定义设备组件对底层的硬件进行屏蔽,实现上层应用与底层硬件相互分离,SCA符合性测试通过验证实际的应用是否符合SCA标准中的定义,从而保证应用的跨平台性与通用性。当前国内外对SCA符合性测试的研究较少,测试过程中存在诸多问题,如各需求的测试之间存在依赖关系,某些需求测试的进行可能造成后续需求测试无法执行等,导致目前缺乏自动化的测试方法。针对这些问题,提出了一种测试序列自动生成方法,并基于扩展有限状态机的基本原理构造了SCA符合性测试模型。该模型能够直观地反映测试过程,分析测试中软件无线电系统存在的各种状态,判断测试用例执行序列的可行性,指导测试序列的构建,再结合基于集合的贪心算法对测试序列集进行优化。实验结果表明该方法能有效地保证测试覆盖度,并且提升测试效率。
文摘针对软件通信架构(Software Communication Architecture,SCA)核心框架在机载领域臃肿和低效等问题,提出了一种面向机载软件无线电(Software Defined Radio,SDR)系统的SCA核心框架优化方案。首先,为使架构轻量高效,提出功能单元裁剪方法;其次,针对时间优化问题,分析了SCA的局限性,提出可灵活配置的加载流程优化技术,在兼容SCA规范的基础上可根据实际系统特点实施灵活的组件加载,充分发挥系统的并行加载潜力来缩短加载时间。实验结果表明,所提的优化技术能够有效提升SDR系统可用性,对面向机载SDR系统的SCA架构优化设计和应用具有较强的指导意义。
文摘Software Defined Radio (SDR) architecture allows us to integrate different mobile technologies using common hardware but with different software modules. To achieve this, we need to keep the signal in digital form for as much portion of the circuitry as possible, so that the implementation could be carried out by programmable digital processors. For this purpose, the incoming radio frequency (RF) signal is down converted to baseband spectrum using band pass sampling method. Research works carried out so far in this field have developed a few algorithms for band pass sampling. But, these algorithms are not much useful for most of the mobile communication systems and they use complex methodology for computing the sampling frequency values. In order to use the SDR platform to integrate all current wireless technologies, an efficient, cost effective and less complex algorithm that can be labelled as universal band pass sampling algorithm is developed in this paper for multiple mobile systems. This algorithm is based on a novel idea of inserting guard bands between the signals which reduces the design complexities of perfect ADC and sharp cut off filters. Using this algorithm, valid sampling frequency ranges and corresponding IF values are calculated for down converting RF signals. The algorithm is tested for six RF signals of different wireless technologies which are integrated and simultaneously down converted using SDR based front end receiver and thus the system multiplies the base station capacity by a factor of six. The simulation results are obtained and shown in this paper which proves that the algorithm developed works well for most of the wireless technologies.