The Impact of WARC-79 on Space Applications

Prior to the 1979 World Administrative Radio Conference (WARC-79), no frequency bands were allocated for remotesensing measurements. Actions taken by the WARC insure that frequencies will be available for such use, and that operations can be conducted without harmful interference on a worldwide basis for the benefit of all nations. Allocations employed for transfer of scientific data from spacecraft in all regions of space from near-Earth orbit to deep-space planetary ranges were significantly improved. New global allocations for Earth exploration-satellites will permit worldwide acquisition of Earth exploration data both via direct transmission and via relay satellites. New allocations for meteorological satellite data transmission will permit wide-band applications such as direct reception of highresolution picture data by users. Satellite-aided search and rescue systems will benefit from WARC decisions to allocate frequencies exclusively for emergency radiobeacon systems using space techniques. Bands to provide links between the satellite and Earth were designated for distress and safety operations. Time and frequency services with accuracies in the 10- to 50-ps range, needed to meet future system requirements for precise time and frequency information, will be possible because of WARC actions to allocate frequency bands with suitable bandwidth for these services. The search for communications from extraterrestrial intelligence was afforded a degree of protection near several spectral lines of basic physical interest.     

WARC-79 Changes to the Technical Radio Regulations

The WARC-79 met to revise and reorder the International Radio Regulations. This encompassed consideration of some 1300 pages of text over a two and one third month period by approximately eighteen hundred people. Approximately fourteen thousand proposals were presented. Technical proposals were considered within Committee 4 which was chaired by N. Morishima of Japan. This paper will identify those sections of the Radio Regulations considered in the Technical Committee, the important changes, and the implications thereof.     

The Impact of WARC-79 on the Broadcasting-Satellite Service

The World Administrative Radio Conference, Geneva, Switzerland, 1979 (WARC-79) decided many of the international issues facing the Broadcasting-Satellite service (BSS) and adopted Resolutions and Recommendations dealing with most of the others. This paper identifies the BSS issues considered at WARC-79, describes the actions taken during the Conference, indicates the current status of subsequent WARC-mandated activities involving the BSS, and assesses the potential impact of the WARC on future BSS systems.     

Impact of WARC-79 on the Studies of International Radio Consultative Committee (CCIR)

The CCIR provided the main technical bases for the World Administrative Radio Conference, 1979, including terminology; technical bases for allocation, regulation, and for the provision for new services; characteristics of equipment and emissions; radio wave propagation and noise data. The WARC specified CCIR studies to be carried out for a number of future radio conferences to be held in the 1980-1986 time period, including a conference in 1983 to plan satellite broadcasting in the region of the Americas and a world conference in 1984/1986 concerning the geostationary satellite orbit. Additional studies set out for technical radio regulations included, for example, determination of coordination area around an Earth station in the bands from 1 to 40 GHz shared between space and terrestrial services, and other technical criteria for frequency band sharing. Over the next few years, because of the intense schedule of ITU administrative radio conferences, CCIR studies related to frequency sharing and other radio regulations will increase markedly.     

The WARC-79 and Papua New Guinea

This paper briefly describes Papua New Guinea, a newly independent country, its telecommunications facilities, and its proposals to the 1979 World Administrative Radio Conference (WARC79), and selected WARC-79 results. The importance of the highfrequency (HF) band is emphasized. It is concluded that most of the requirements of Papua New Guinea regarding the Table of Frequency Allocations were met-although some were not met in the way in which they were first proposed.     

Regulatory Procedures and WARC-79

There are two major elements of a General World Administrative Radio Conference such as WARC-79. One is to review and revise allocations of radio frequencies to functional services such as fixed, mobile, satellite, and radionavigation. The other major element is the detailed radio regulations concerning use of these allocations by member Administrations. These regulations combine technical, economic, geopolitical, and other considerations into a framework which attempts to satisfy the perceived requirements of all Administrations. This aspect of WARC79 is the subject of this paper. As will be seen, some substantial changes in regulations were made at the Conference, especially those concerning HF assignments and use. Other changes are implicit in the Resolutions for future conferences which were adopted at WARC-79. The key to success in framing effective and acceptable allocations, and regulations, is cooperation. In this respect, WARC-79 was not much different from preceding conferences, despite contrary misgivings.     

未来智能无线电将对频谱管理带来深刻影响

介绍了智能无线电的进展和特点,分析和论述了造成未来频谱资源供求矛盾的主要因素,提出了智能无线电对未来频谱管理所带来的深刻影响及解决未来频谱资源供求矛盾的方法和建议。     

无线广播频谱监测与管理系统

本文介绍全频段无线广播频谱监测与管理系统的设计与实现.该系统主要采用终端硬件采集和前端软件分析、处理及展示的两级结构模式,采用宽带数字接收机作为采集终端的核心硬件,使终端设备高度集成化,前端采用软件对采集的海量频谱数据进行可视化的解调、分析,可查找广播电视各频段符合要求的频率,构建一个结构合理、易于维护的无线广播频谱监测与管理系统.     

Radio Spectrum Management for Tetherless Communications

For any new radio technology, spectrum management is an essential part of the development process, to identify the best frequency band for operation of the system. This has to take account of the many other users and applications of the radio spectrum, so that systems neither cause, nor receive, harmful interference from other radio systems. It is a process that is sometimes considered to be unnecessarily restrictive and slow; however, that is because it is often a difficult balancing act between the technical, commercial and political pressures on the (finite) radio spectrum. This paper describes the underlying principles and processes of radio spectrum management, explaining the relationships between the organisations which are responsible for spectrum management at the national, regional and international levels. It also describes the current work on the identification of frequency bands for the new tetherless communications technologies, and in particular the 2.4 and 5 GHz bands. This revised version was published online in July 2006 with corrections to the Cover Date.     

无线电频谱资源管理研究现状分析

对国内外频谱资源管理的研究现状进行了总结。比较了目前几种有代表性的频谱资源管理方式的特点与区别。从电磁兼容分析技术研究、基于频谱资源价值的管理方法研究、频谱资源管理系统分析方法研究等几个方面分析了频谱资源管理的研究进展。结合当前频谱资源的研究现状以及信息科学、系统科学的快速发展带来的研究环境的变化,探讨了复杂环境下频谱资源管理问题的研究趋势。     

现代无线电频谱管理模式的研究

对现代无线电频谱管理模式进行了简要的介绍,并对这些模式进行了分析比较.提出了我国未来无线电频谱管理的建议,建议频谱资源管理手段应为兼具命令与控制模式、基于市场的产权模式、共享或无执照模式、智能管理模式4种模式的动态分配方式.     

认知无线电与未来动态电磁频谱管理设想

当前静态的电磁频谱管理模式已经无法适应无线通信技术的飞速发展．频谱管理模式亟待变革。认知无线电技术可以感知周围无线频谱环境．并且通过实时改变操作参数以更好地利用有限的频谱资源。这种思想给未来的频谱管理带来了希望．基于认知无线电技术的频谱管理模式已成为频谱管理部门的研究热点。本文基于认知无线电技术对未来的频谱管理模式提出了一些设想．供相关部门和研究人员参考。     

认知无线电网络中的频谱管理技术

由于可用频谱的动态特性和应用需求的多样性,认知无线电（Cognitive Radio,CR）面临很多挑战,其中最为迫切的一个问题是有效的频谱管理技术。首先简要介绍认知无线电及其网络体系结构,然后讨论频谱管理的定义和功能,具体包括四个主要方面：频谱感知、频谱决策、频谱共享和频谱迁移。     

无线电通信频谱管理模型研究

分析了无线电系统内部干扰及系统间的电磁干扰,提出了基于频率、时间和地理区域三维空间的频率规划方法,论述了实现频谱管理的6个基本要素,给出了基于电磁兼容性的一种频谱管理模型。