Radiotekhnika
Publishing house Radiotekhnika

"Publishing house Radiotekhnika":
scientific and technical literature.
Books and journals of publishing houses: IPRZHR, RS-PRESS, SCIENCE-PRESS


Тел.: +7 (495) 625-9241

 

Realization of digital modulator and demodulator of spectrally efficient multifrequency signals

Keywords:

S.B. Makarov – Dr. Sc. (Eng.), Professor, Director of of Institute of Physics, Nanotechnology and Telecommunica-tions, Peter The Great St.Petersburg Polytechnic University. E-mail: makarov@cee.spbstu.ru S.V. Zavjalov – Assistant, Department РСЗИ, Institute of Physics, Nanotechnology and Telecommunications, Pe-ter The Great St.Petersburg Polytechnic University. E-mail: zavyalov_sv@spbstu.ru


Possibility of practical realization on digital modulator and demodulator of nonorthogonal multifrequency signals is shown. Duration of envelope on each subcarrier exceeds the duration of OFDM signals. Modulator and demodulator of SEFDM signals are based on FFT/IFFT. Experimental units are developed on multiprocessor platform Sundance SMT148FX with cards SMT351, SMT362 и SMT903. These cards contain digital processor, FPGA, ADC/DAC, transceivers and various interfaces. Energy spectrum are results of experimental research. OFDM signals are used for verification systems. Gain on level of out-of-band emissions and occupied frequency bandwidth of SEFDM signals in comparison with OFDM signals is shown by experimental researches.
References:

 

  1. Weinstein, Ebert P. Data transmission by frequency-division multiplexing using the discrete Fourier transform // IEEE Transactions on communications. 1971. V. 19. № 5. P. 628−634.
  2. Ioannis D. Kanaras. Spectrally Efficient Multicarrier Communication Systems:Signal Detection, Mathematical Modelling and Optimisation // A thesis submitted for the degree of Doctor of Philosophy (Ph.D). Communications and Information Systems Research Group Department of Electronic and Electrical Engineering University College. London. June 2010.
  3. Kanaras Y., Chorti A., Rodrigues M., Darwazeh I. An overview of optimal and sub-optimal detection techniques for a non orthogonal spectrally efficient FDM. LCS/NEMS\'09. London. UK. 2009, 3−4 Sep.
  4. Clegg R.G., Isam S., Kanaris I., Darwazeh I. A practical system for improved efficiency in frequency division multiplexed wireless networks // IET Communications. 2012. V. 6. № 4. P. 449−457.
  5. Makarov S.B., Zavjalov S.V. Optimizacija formy ogibajushhejj spektralno-ehffektivnykh mnogochastotnykh signalov // EHlektromagnitnye volny i ehlektronnye sistemy. 2014. T. 19. № 7. S. 38−45.
  6. Sergey V. Zavjalov, Sergey B. Makarov, Sergey V. Volvenko. Application of Optimal Spectrally Efficient Signals in Systems with Frequency Division Multiplexing // Proceedings of 14th International Conference NEW2AN and 7th Conference ruSMART. St. Petersburg. Russia. 2014, August 27−29. P. 676−685.
  7. Prokis D. Cifrovaja radiosvjaz / Per. s angl. Pod red. D.D. Klovskogo. M.: Radio i svjaz. 2000. 800 s.
  8. Makarov S.B., Zavjalov S.V. CHastotnaja i ehnergeticheskaja ehffektivnosti neortogonalnykh mnogochastotnykh sistem peredachi soobshhenijj // Radiotekhnika. 2015. № 1. S. 50−59.
  9. Vishnevskijj V.M., Ljakhov A.I., Portnojj S.L., SHakhnovich I.V. SHirokopolosnye besprovodnye seti peredachi informacii. M.: Tekhnosfera. 2005. 592 s.
  10. Volkov L.N., Nemirovskijj M.S., SHinakov JU.S. Sistemy cifrovojj radiosvjazi: bazovye metody i kharakteristiki: Ucheb. posobie. M.: EHko-Trendz. 2005. 392 s: il.
  11. Sjuvatkin V.S.WiMAX – tekhnologija besprovodnojj svjazi: osnovy teorii, standarty, primenenie / Pod red. V.V. Krylova. SPb.: BKHV-Peterburg. 2005. 368 s.
  12. Makarov S.B., Zavjalov S.V. Povyshenie pomekhoustojjchivosti kogerentnogo priema neortogonalnykh mnogochastotnykh signalov // Nauchno-tekhnicheskie vedomosti SPbGPU. 2014. № 2(193). S. 45−55.
  13. Sergey V. Zavjalov, Sergey B. Makarov, Sergey V. Volvenko. Nonlinear Coherent Detection Algorithms of Nonorthogonal Multifrequency Signals // Proceedings of 14th International Conference NEW2AN and 7th Conference ruSMART. St. Petersburg. Russia. 2014, August 27−29. P. 703−713.
  14. Wei Xue, Weiqun Ma, Bingcai Chen. A Realization Method of the Optimized Efficient Spectrum Signals Using Fourier Series // 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM). 2010, 23−25 Sept. P. 1−4.

 

© Издательство «РАДИОТЕХНИКА», 2004-2017            Тел.: (495) 625-9241                   Designed by [SWAP]Studio