Improved Preamble-Based Symbol Timing Synchronization Schemes for GFDM Systems
Generalized frequency division multiplexing (GFDM) is a flexible multicarrier modulation scheme and has been considered as a candidate for the physical layer of the 5G mobile communication system. The bit error rate performance of GFDM is affected by the symbol timing synchronization errors; however, the existing preamble-based symbol timing synchronization scheme for GFDM systems suffers from the timing-ambiguous plateau problem. In this paper, two improved preamble structures are constructed according to the characteristics of GFDM symbols to eliminate the timing-ambiguous plateau. The simulation results under AWGN and multipath fading channels show that the proposed autocorrelation timing synchronization schemes have better timing MSE performance compared to the existing preamble-based timing synchronization schemes.
Keywords5G GFDM Synchronization Autocorrelation
This work was supported in part by Fundamental Research Funds for Central Universities under grant No. 3132016318.
- 2.Gerhard F, Marco K, Steffen B. GFDM—Generalized frequency division multiplexing. In: IEEE 69th vehicular technology conference; 2009. p. 1–4.Google Scholar
- 3.Ivan SG, Luciano LM, Nicola M, Gerhard F. A synchronization technique for generalized frequency division multiplexing. EURASIP J Adv Signal Process. 2014;67:1–10.Google Scholar
- 4.Ivan SG, Gerhard F. An embedded midamble synchronization approach for generalized frequency division multiplexing. In: IEEE global communications conference; 2015. p. 1–5.Google Scholar
- 5.Chenglong Y, Ying W, Tingting Y, Bin L. Superimposed training for time synchronization in GFDM systems considering out of band emission. In: The 4th international conference on systems and informatics (ICSAI); 2017. p. 944–948.Google Scholar
- 6.Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) radio transmission and reception 2015. http://www.etsi.org/deliver/etsi_ts/136100_136199/136104/12.06.00_60/ts_136104v120600p.pdf.