SCA4．0规范概述

软件通信体系结构（SCA）规范建立了一个与实现无关的框架，是开发软件定义无线电（SDR）软件的基本要求。SCA标准已经发布了多个版本。最新发布的SCA4．0是标准的一个重要修订。SCA4．0引入选择性继承的设计模式，实现了轻量级组件。Push模型的引入减少了启动和初始化时间，且消除了命名服务的需要。SCA4．0中不再规定CORBA是必需的中间件。SCA4．0通过分级应用和应用连通性支持在一个平台配置多个应用。SCA4．0标准可以裁剪，更好地适应每个无线电台及其功能的具体能力，比SCA2．2．2更易升级、轻量级、灵活。

Overview of SCA 4.0 Specification

SCA （Software Communications Architecture） establishes an implementation- independent framework, which serves as the baseline requirements for the software development for SDR （software defined radios）. The SCA standard has already released several versions since 1999, and the newly-released SCA 4.0 is a major revised version of the standard. SCA 4.0, with the introduction of a new optional-inheritance design pattern, could realize lightweight components, and the introduction of Push model by SCA 4.0 can also reduce the time of startup and instantiation, and eliminate the need of naming service. CORBA is no longer mandated in SCA 4.0. By nested applications and application interconnection, the SCA component framework can directly support multiple-application deployment on a platform. SCA4.0 could be well tailored to the specific capabilities of each radio and its mission, and is more scalable, lightweight, and flexible than SCA 2.2.2.