基于软件无线电收发机前端设计方法的分析与研究
2015-07-18邱旦峰于为卜刚
邱旦峰 于为 卜刚
摘要:软件无线电技术将很大程度上解决当前个人无线通信系统所面临的挑战如产品开发周期和生存期的挑战,移动终端功能多样化带来的系统集成和功耗的挑战。因而其被提出后很快成为国内外无线通信领域的研究热点,被普遍认为是继无线技术数字化之后的第二次技术革命。通过研究自适应电路设计方法,使软件无线电收发前端的性能可以随着信道质量的变化自适应地调整,从而使电路功耗最小。
关键词:软件无线电;收发前段;自适应调整;优化算法
中图分类号:TP393 文献标识码:A 文章编号:1009-3044(2015)12-0228-02
Analysis and Research the Front-end Design Method of Software Radio Transceiver
QIU Dan-feng, YU Wei, BU Gang
(School of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016,China)
Abstract:Software radio technology will largely address the challenges of the current personal wireless communication system faces. Such as product development cycle and survival challenges ,and mobile terminal functional diversity brings system integration and power challenges. The software radio technology was made soon after become a hot topic at home and abroad in the field of wireless communications, and it is generally regarded digital wireless technology after second technological revolution .By studying the adaptive circuit design that enables performance radio front-end software can change the channel with the quality of adaptively adjusted to minimize the power consumption of the circuit.
Key words: software defined radio; transceiver front-end; adaptive; optimization
随着器件尺寸的不断缩小、工作电压的下降,CMOS模拟/射频电路设计的挑战性不断增加,因而希望在收发机中模数转换器件离天线越近越好,直至直接在天线后进行数字化。软件无线电收发前端的设计有很大挑战性,除了不同标准之间性能指标的多样性使覆盖的频段范围宽、动态范围跨度大之外,功能的多样化、数据链路的宽带化导致的额外能耗,使如何降低移动终端的功耗、延长续航时间,成为软件无线电终端系统辄待解决的关键问题。本文的重点是研究降低系统功耗,同时将使无线收发机前端具有环境感知的智能性的实现。
1 软件无线电技术
软件无线电概念的正式提出是在上世纪九十年代初,其核心思想是用标准化、模块化、通用化和可编程的部件实现无线收发机的硬件部分,而其具体的功能以及性能参数用软件编程实现,从而实现不同体制和同一体制不同版本的通信标准的兼容性和灵活适应性。……
