ITU-R QUESTION 2465-2007 Technical characteristics and channelling requirements for adaptive HF systems《高频适应系统的技术特点和频道要求》.pdf

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1、QUESTION ITU-R 246/5*Technical characteristics and channelling requirements for adaptive HF systems(2007)The ITU Radiocommunication Assembly,consideringa) that in recent years adaptive HF systems which can automatically select a channel from anassigned group and control modulation mode, transmission

2、 speed and transmission power havebeen developed and continue to be developed;b) that voice traffic is increasingly being replaced by data traffic, which tends to require a highquality channel for short periods;c) that use of adaptive HF systems, which release the channel when they have no traffic,a

3、llows frequencies to be shared between several systems or users;d) that adaptive systems should achieve optimum operational performance and compatibility,decides that the following Question should be studiedWhat are the appropriate technical characteristics and channelling requirements to implementa

4、daptive HF systems, taking into account efficient use of spectrum and minimization ofinterference?further decides1 that the results of the above study should be included in one or more Recommendation(s)and/or Report(s);2 that studies should be completed by 2010 at the latest.Category: S2_* Former Question ITU-R 241/9.