An efficient Frequency and Symbol Synchronization Scheme for DVB-T System 


Vol. 27,  No. 2, pp. 170-183, Feb.  2002


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  Abstract

This paper proposes an efficient frequency and symbol synchronization structure which could solve problems of the conventional methods to implement DVB-T receiver modem which adopted OFDM transmission method. The main considerations of frequency synchronization algorithms are that the frequency tracking performance is not stable enough, and lots of symbols are required, especially when the decimal part of normalized frequency offset (which original frequency offset is divided by the subcarrier spacing) is around ±0.5. To solve these problems, we propose an efficient frequency synchronization algorithm that estimates and compensates for the coarse and fine synchronization simultaneously and solves the ambiguity of the decimal part of normalized frequency offset around ±0.5 by using the average of coarse synchronization over several symbols. Also, we suggest a new symbol synchronization structure which is easy to implement without performance degradation in multipath fading channel with only coarse symbol synchronization by making window offset to always belong to the range of guard interval in contrast to the conventional structure of dividing symbol synchronization in fine and coarse mode during synchronization. By extensive simulation, we have shown the superiority of the proposed schemes.

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  Cite this article

[IEEE Style]

H. W. Lee, K. Y. Kim, H. J. Choi, "An efficient Frequency and Symbol Synchronization Scheme for DVB-T System," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 2, pp. 170-183, 2002. DOI: .

[ACM Style]

Hyung Wook Lee, Ki Yun Kim, and Hyung Jin Choi. 2002. An efficient Frequency and Symbol Synchronization Scheme for DVB-T System. The Journal of Korean Institute of Communications and Information Sciences, 27, 2, (2002), 170-183. DOI: .

[KICS Style]

Hyung Wook Lee, Ki Yun Kim, Hyung Jin Choi, "An efficient Frequency and Symbol Synchronization Scheme for DVB-T System," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 2, pp. 170-183, 2. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880