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Software-defined radio and cognitive radio systems

机译：软件定义的无线电和认知无线电系统

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摘要

A definition of adaptive systems was introduced into the Radio Regulations more than a decade ago. Adaptive systems are defined as being capable of modifying their parameters, including frequency and power, in order to improve the quality of reception. Today, such systems are limited to the medium and high frequency bands, where propagation conditions vary significantly. Regulatory provisions applicable to adaptive systems prohibit their operation in the bands used by safety services, as well as by the radio astronomy, radiode-termination, amateur and broadcasting services. Further technological developments have increased the capabilities of adaptive systems. Software plays an important role in this respect, making it possible to analyse the radio environment and adjust system characteristics to specific operational situations. Such a combination of radio equipment and software offers new solutions for resolving the problem of frequency congestion and improves the overall efficiency of spectrum use. With these technological advances, two new concepts have emerged: software-defined radio and cognitive radio systems (see box).
机译：十多年前，在《无线电规则》中引入了自适应系统的定义。自适应系统被定义为能够修改其参数，包括频率和功率，以提高接收质量。如今，此类系统仅限于传播条件变化很大的中频带和高频带。适用于自适应系统的法规规定禁止其在安全服务以及射电天文学，射电终结，业余和广播服务使用的频带内运行。进一步的技术发展提高了自适应系统的功能。在这方面，软件起着重要的作用，可以分析无线电环境并根据特定的操作情况调整系统特性。无线电设备和软件的这种组合为解决频率拥塞问题提供了新的解决方案，并提高了频谱使用的整体效率。随着这些技术的进步，出现了两个新概念：软件定义的无线电和认知无线电系统（见方框）。

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  • 来源
    《ITU news》 |2012年第1期|p.84-85|共2页
  • 作者

    Sergey Pastukh;

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    ITU-R Working Party 1B;

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