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METHODS OF QUALITY CONTROL SIGNALS IN DIGITAL RADIORELAY AND TROPOSPHERIC COMMUNICATION STATION
Bondarenko G. I., senior lecturer, Zinchenko A. K., undergraduate student
National Technical University of Ukraine Kyiv Polytechnic Instituteї, Kyiv, Ukraine

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1. . . (ATM, PDH, SDH, SONET WDM); (2- , ) / . . . : , 2000. 421 .
2. . . / . . . , 2006. 91 .
3. ITU-T G.821 Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an integrated services digital network.
4. ITU-T G.826 Error performance parameters and objectives for international constant bit rate digital paths at or above the primary rate.
5. ITU-T G.828 Error performance parameters and objectives for international, constant bit - rate synchronous digital paths.
6. ITU-T G.829 Error performance events for SDH multiplex and regenerator sections.
7. . . / . . . : - -ї, 1997 . 139 .
8. . . / . . - .: -ї, 2001 . 261 .
9. . : http://www.osp.ru/lan/2005/10/377334/ .
10. ITU-R Rec. S.1062-2. Allowable error performance for a hypothetical reference digital path operating at or above the primary rate (11/99).
11. ITU-R Rec. S.614-3. Allowable error performance for a hypothetical reference digital path in the fixed-satellite service operating below 15 GHz when forming part of an international connection in an integrated servicES digital network (11/93).
12. - : . 2 - ., . . / . . . . . . . : - ї, 2005. 576 .
References
1. Slepov N. N. Sovremennue tehnologii tsufrovukh optovolokoonukh setei sviazi (ATM, PDH, SDH, SONET i WDM), (2-e izdanie, ispravlenoe). M.: Radio i sviaz, 2000, 421 p.
2. Kanakov V. A. Novie tekhnologii izmereniia v tsufrovuh kanalakh peredachi infor-matsii. N. Novgorod, 2006, 91 p.
3. ITU-T G.821 - Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an integrated services digital network.
4. ITU-T G.826 - Error performance parameters and objectives for international constant bit rate digital paths at or above the primary rate.
5. ITU-T G.828 - Error performance parameters and objectives for international, constant bit - rate synchronous digital paths.
6. ITU-T G.829 - Error performance events for SDH multiplex and regenerator sections.
7. Baklanov I. G. Tekhnologiia izmerenii v sovremennukh telekomunikatsiiakh. - M.: Izdatelstvo "Eko - Trendz", 1997 g., 139 s.
8. Baklanov I. G. Testirovanie i diagnostika system sviazi. M. : "Eko - Trendz", 2001, 261 p.
9. Yvantsov Y. Yzmerenyya v tsyfrovbikh systemakh svyazy rezhym dostupu: http://www.osp.ru/lan/2005/10/377334/ nazva za ekrana.
10. ITU-R Rec. S.1062-2. Allowable error performance for a hypothetical reference digital path operating at or above the primary rate (11/99).
11. ITU-R Rec. S.614-3. Allowable error performance for a hypothetical reference digital path in the fixed-satellite service operating below 15 GHz when forming part of an international connection in an integrated servicES digital network (11/93).
12. Dmytryeva S. A. i Slepova N. N. Volokonno - optycheskaya tekhnyka: Sovremennoe sostoyanye y perspektyvbi. 2 - e yzd., pererab. Sb. statey pod red. M. : OOO Volokonno - optycheskaya tekhnykaї, 2005, 576 p.
. I., . . -i cie '. cmammi i i 3a^6ie i i ', i3 i ieu 2048 / ( 1). i i , i, , BER - (Bit Error Ratio, ) ES - (Error Seconds, ). i -i , , i i .
oei : i, ii .
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Bondarenko G. I., Zinchenko A. K. Methods of quality control signals in digital radio relay and tropospheric communication station.
Introduction. The modern digital communication systems such as radiorelay and tropo-spheric communication, their advantages before the analogue systems, requirements for digi-
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tal systems in terms of accurate data transmission and control errors in service monitoring are described.
Performance error in digital path. The overview of main error indicators in digital communication systems, approved by international telecommunication union is provided in this section. It contains a brief description of determine the readiness state and error seconds calculation method.
Methods for evaluating the quality of digital signal. The questions measuring key indicators of errors that can occur in the digital channel, such as BER - (Bit Error Ratio) and ES -(Error Seconds) are considered. The description of the methods for measuring these indicators, so as out of service and in service monitoring is given. The errors detection method used the E1 stream structure and their efficiency is described. The diagnostic methods in the digital path in service monitoring and applications features for authentic definition of the bit errors coefficient based on CRC-4 procedure are compared. One of the methods offers to get probabilistic relations between the parameters based on BER and ES / SES for the evaluation digital path use, using a probabilistic model of the processes occurring in the measurements. Mask of bit errors ratio of the relative measurements time is produced.
Conclusions. The methods of control quality signals for errors in digital communication systems compared different approaches for indicating and calculation the main indicators of errors, such as BER and ES/SES are analyzed. It is recommended to use CRC-4 procedure with probabilistic model of the processes occurring in the measurements using distribution mask bit error probability for channels with different bandwidth for the quantitative evaluation the quality radio path.
Keywords: digital stream, methods for evaluating digital signals, bit errors.