A. V. Belyaev – Post-graduate Student, Southern Federal University (Rostov-on-Don)

A. O. Kasyanov – Dr.Sc. (Eng.), Professor, Southern Federal University (Rostov-on-Don)

E-mail: kasao@mail.ru

Yu. G. Popov – Seeker, JSC “Radium-TN” (Moscow)

The algorithm for determining of the OFDM-signal basic parameters based on the features of the formation of a cyclic prefix and an algorithm for identifying of radio transmissions by known parameters have been considered. Main factors influencing the accuracy of the algorithms have been determined. Mathematical simulation has been performed and the OFDM-signal parameters measurement accuracy dependence on signal-to-noise ratio and other main influencing factors has been obtained. The possibility of using the developed algorithms in modern radio monitoring systems and cognitive radio technologies has been analyzed.

1. Rekomendatsiya MSE-RSM.1600-1. 2012. Tekhnicheskaya identifikatsiya tsifrovykh signalov.
2. Ishii H., Wornell G. OFDM blind parameter identification in cognitive radios // IEEE 16th Internat. Symposium on Personal, Indoor and Mobile Radio Communications. 2005. P. 700–705.
3. Bakulin M.G., Krejndelin V.B., Shloma A.M., Shumov A.P. Tekhnologiya OFDM. M.: Goryachaya liniya – Telekom. 2016.
4. Gorcin A., Huseyin A. An OFDM signal identification method for wireless communications systems // IEEE Trans. on Vehicular Technology. 2015. V. 64. P. 5688–5700.
5. Tevfik Y., Huseyin A. OFDM signal identification and transmission parameter estimation for cognitive radio applications // IEEE Global Telecommunications Conference. Washington. 2007. P. 4056–4060.
6. Belyaev A.V., Kas'yanov A.O. Opredelenie chastotnogo raznosa podnesushchikh v sistemakh s ortogonal'nym chastotnym razdeleniem signalov v usloviyakh apriornoj neopredelennosti // Materialy 11-j Mezhdunar. molodezhnoj nauch.-tekhnich. konf. «Sovremennye problemy radiotekhniki i telekommunikatsij». Sevastopol'skij gos. un-t. 2015. S. 162.
7. Ajficher E., Dzhervis B. Tsifrovaya obrabotka signalov. Prakticheskij podkhod. M.: ID «Vil'yams». 2004.
8. Manelis V.B., Kayukov I.V. Adaptatsiya pilot struktury i dliny zashchitnogo intervala OFDM signala k izmenyayushchimsya kanal'nym usloviyam // Tsifrovaya obrabotka signalov. 2009. № 4. S. 59–64.
9. Recommendation ITU-R SM.1537. Automation and integration of spectrum monitoring systems with automated spectrum management.
10. Hyunwook K., Jaewoon K., Suckchel Y., Minki H., Yoan Sh. An effective MIMO–OFDM system for IEEE 802.22 WRAN channels // IEEE Trans. on Circuits and Systems – II: Express briefs. 2008. V. 55. № 8.
11. Recommendation ITU-RF.1487. Testing of HF modems with bandwidths of up to about 12 kHz using ionospheric channel simulators.