ITU-R QUESTION 214-33-2007 Radio noise《无线电噪声》.pdf

1、-1-QUESTION ITU-R 214-3/3Radio noise(1978-1982-1990-1993-2000-2007)The ITU Radiocommunication Assembly,consideringa) that radio noise of natural or man-made origin often determines the practical limit ofperformance for radio systems and thus is an important factor in planning efficient use of thespe

2、ctrum;b) that much has been learned about the origin, statistical characteristics, and generalintensities of both natural and man-made noise, but that additional information is needed,particularly for parts of the world not previously studied, for the planning of telecommunicationssystems;c) that fo

3、r system design, determination of system performance and spectrum utilizationfactors, it is essential to determine the noise parameters appropriate in considering variousmodulation methods, including, as a minimum, the noise parameters described inRecommendation ITU-R P.372,decides that the followin

4、g Question should be studied1 What are the intensities and the values of other parameters of natural and man-made noisefrom local and distant sources, in both indoor and outdoor locations; what are the temporal andgeographical variations, the directions of arrival, and the relationship to changes in

5、 geophysicalphenomena, such as solar activity; and how should measurements be made?2 Where the radio noise has an impulsive characteristic, what are the appropriate parametersto describe the noise and how does the impulsive noise vary with frequency, location, season, etc.?further decides1 that appropriate information concerning radio noise resulting from studies within the ITU-Rshall be contained in Recommendations and or Reports;2 that the above studies should be completed by 2010.Category: S2