Algorithm for the Improvement of Time and Frequency Synchronization Performance in OFDMA System 


Vol. 31,  No. 4, pp. 402-411, Apr.  2006


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  Abstract

In OFDMA system, multiple users transmit signal through the subcarriers assigned to the user. Capabilities of high data-rate transmission in OFDM system come from the ability to compensate the ICI (Inter Carrier Interference) using a single-tap equalizer and to implement transmitter and receiver by employing high speed FFT circuitry. Issues of time and frequency synchronization in OFDM system is quite essential to preserve the orthogonality among subcarriers not to produce ICI. In this paper, we first analyze the preamble used in 802.16 d/e and WiBro system. Then we propose an effective timing synchronization algorithm, which is more accurate than the conventional one in the sense of timing position, and integral frequency offset estimation scheme for the simultaneouse estimation of the fractional and integral frequency offset. Through the simulation utilizing the proposed synchronization algorithm and structure, we show that the performance degradation due to the adjacent channel interference can be mitigated for the than conventional ones.

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  Cite this article

[IEEE Style]

J. Noh, T. Sun, K. Chang, "Algorithm for the Improvement of Time and Frequency Synchronization Performance in OFDMA System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 4, pp. 402-411, 2006. DOI: .

[ACM Style]

JungHo Noh, TaeHyoung Sun, and KyungHi Chang. 2006. Algorithm for the Improvement of Time and Frequency Synchronization Performance in OFDMA System. The Journal of Korean Institute of Communications and Information Sciences, 31, 4, (2006), 402-411. DOI: .

[KICS Style]

JungHo Noh, TaeHyoung Sun, KyungHi Chang, "Algorithm for the Improvement of Time and Frequency Synchronization Performance in OFDMA System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 4, pp. 402-411, 4. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880