Development of blind frame synchronization for transfer system with differential space-time block coding

Authors

  • Mikhail Tokar Odessa National O. S. Popov Academy of Telecommunications, 1, Kuznechna str., Odessa, Ukraine, 65029 Taras Shevchenko Transnistria State University, 128, 25 Zhovtnia str., Tiraspol, Moldova, 3300, Ukraine https://orcid.org/0000-0002-1063-7940

DOI:

https://doi.org/10.15587/2312-8372.2020.196277

Keywords:

MIMO system, frame synchronization, pilot signal, time-frequency resource, blind signal processing method, space-time signal redundancy

Abstract

The object of this research is the methods and algorithms for frame synchronization used in multi-antenna radio systems (Multiple Input Multiple Output – MIMO). The implementation of radio communication systems and, in particular, MIMO, implies that the demodulator synchronizes the phase of the reference carrier and the time of signal processing processes. Time synchronization is divided into symbolic and frame synchronization. As for the synchronization of the reference carrier and symbol synchronization, these types of synchronization are provided by traditional methods and are not considered in this paper. The frame synchronization in the vast majority of cases is provided by the use of pilot signals (sync words). At their core, they are markers and are periodically embedded in the data stream to indicate the beginning of another new data block. The resources of the transmission system, spent on the transmission of pilot signals, are not used to transmit user information, as a result of which the efficiency of using the time-frequency resource of the system is degraded. To a lesser extent, there are so-called «blind» signal processing methods based on the redundancy properties of the transmitted signal. These methods have no drawbacks from the use of pilot signals and are divided into methods for assessing the state of the communication channel, signal identification, and synchronization. Based on this, such methods are of practical interest.

In this work, let’s propose a frame synchronization method for demodulating differential space-time block coding signals using MIMO technology. The synchronization algorithm does not require the use of preambles and sync words, which ensure efficient use of the time-frequency resource. An analysis of the structure of the algorithm and the simulation results show its performance at low signal-to-noise ratios in the transmission system. The algorithm does not require knowledge of the state of the communication channel, has low computational complexity compared to existing analogues, and allows implementation with a different number of transmitting and receiving antennas.

Author Biography

Mikhail Tokar, Odessa National O. S. Popov Academy of Telecommunications, 1, Kuznechna str., Odessa, Ukraine, 65029 Taras Shevchenko Transnistria State University, 128, 25 Zhovtnia str., Tiraspol, Moldova, 3300

Postgraduate Student

Department of Theory of Electrical Communications

Senior Lecturer

Department of Quantum Radiophysics and Communication Systems

References

  1. Tokar, M. S. (2018). Differencialnii metod blokovogo kodirovaniia dlia primeneniia v sistemakh MIMO. Sistemy sinkhronizacii, formirovaniia i obrabotki signalov, 1, 147–159.
  2. Meyr, H., Moeneclaey, M., Fechtel, S. (1998). Digital communication receivers, synchronization, channel estimation, and signal processing. John Wiley & Sons, Inc., 827. doi: http://doi.org/10.1002/0471200573
  3. Rohde, U., Whitaker, J., Zahnd, H. (2017). Communications Receivers: Principles and Design. McGraw-Hill Education, 941.
  4. Fomin, A. I. (2008). Sinkhronizaciia cifrovykh radiosistem peredachi informacii. Moscow: SAINS-PRESS, 80.
  5. Blahut, R. E. (2010). Modem Theory: An Introduction to Telecommunications. Cambridge University Press, 515. doi: http://doi.org/10.1017/cbo9780511811401
  6. Nasir, A. A., Durrani, S., Mehrpouyan, H., Blostein, S. D., Kennedy, R. A. (2016). Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years. EURASIP Journal on Wireless Communications and Networking, 2016 (1), 180–218. doi: http://doi.org/10.1186/s13638-016-0670-9
  7. Mahmood, A., Ashraf, M. I., Gidlund, M., Torsner, J., Sachs, J. (2019). Time Synchronization in 5G Wireless Edge: Requirements and Solutions for Critical-MTC. IEEE Communications Magazine, 57 (12), 45–51. doi: http://doi.org/10.1109/mcom.001.1900379
  8. Volkov, L. N., Nemirovskii, M. S., Shinakov, Iu. S. (2005). Sistemy cifrovoi radiosviazi: bazovye metody i kharakteristiki. Moscow: Eko-Trendz, 392.
  9. Marey, M., Dobre, O. A., Inkol, R. (2013). A Novel Blind Block Timing and Frequency Synchronization Algorithm for Alamouti STBC. IEEE Communications Letters, 17 (3), 569–572. doi: http://doi.org/10.1109/lcomm.2013.13.122518
  10. Marey, M., Dobre, O. A., Liao, B. (2014). Second-Order Statistics-Based Blind Synchronization Algorithm for Two Receive-Antenna Orthogonal STBC Systems. IEEE Communications Letters, 18 (7), 1115–1118. doi: http://doi.org/10.1109/lcomm.2014.2323245

Downloads

Published

2019-12-24

How to Cite

Tokar, M. (2019). Development of blind frame synchronization for transfer system with differential space-time block coding. Technology Audit and Production Reserves, 1(2(51), 30–34. https://doi.org/10.15587/2312-8372.2020.196277

Issue

Vol. 1 No. 2(51) (2020): Information and control systems

Section

Systems and Control Processes: Original Research

License

Copyright (c) 2020 Tokar Mikhail

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.