ITU-R M 1041-2-2003 Future amateur radio systems《未来业余无线系统》.pdf
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1、 Rec. ITU-R M.1041-2 1 RECOMMENDATION ITU-R M.1041-2 Future amateur radio systems (Question ITU-R 48/8) (1994-1998-2003) The ITU Radiocommunication Assembly, considering a) Question ITU-R 48/8; b) that different future systems are under study; c) that system compatibility is necessary for internatio
2、nal operation; d) the need for flexible systems capable of adapting to new developments and natural disasters; e) that the amateur and amateur-satellite bands below 5 GHz are heavily used, and there is a need to reduce interference within these services; f) that the bands above 5 GHz will be subject
3、 to increasing use; g) that to communicate at distances beyond line of sight, propagation characteristics of the bands above 144 MHz usually require use of terrestrial or satellite radio-relays; h) that there is increasing need for high-speed digital communications; j) that commonality of hardware,
4、software and protocols is desirable in order to achieve economies of scale and reduce the cost of systems, recommends that future systems in the amateur and amateur-satellite services should incorporate the following objectives and characteristics, and take into account the following frequency band
5、considerations: 1 Objectives General objectives for future systems in the amateur and amateur-satellite services should: 1.1 General 1.1.1 Promote design of robust systems capable of providing communication during natural disasters. 1.1.2 Accommodate the needs of amateur operators in urban, rural an
6、d remote areas, including those in developing countries. 1.1.3 Make systems widely available to amateur operators at an acceptable cost, recognizing that amateur operators fund their own stations. 2 Rec. ITU-R M.1041-2 1.1.4 Develop compatible and interoperable terrestrial and satellite systems. 1.1
7、.5 Provide a flexible architecture that will facilitate introduction of technology advancements. 1.1.6 Minimize radiated power. 1.2 Technical 1.2.1 Promote increased spectrum efficiency, e.g. through use of automatic power control, automatic link establishment, adaptive antennas, diversity reception
8、, digital signal processing, software defined radio and access techniques such as time division multiple access (TDMA) and code division multiple access (CDMA). 1.2.2 Ensure information integrity through error control techniques. 1.2.3 Encourage the development of common interfaces for the interconn
9、ection of equipment. 1.3 Operational 1.3.1 Provide for operational flexibility and self-organization. 1.3.2 Support international roaming within the amateur services. 1.3.3 Permit amateur stations to gain access to particular capabilities made possible by advances in technology, e.g. automatic langu
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