Joint optimization of time and frequency synchronization based on polynomial sequences for OFDM systems

doi:10.1016/S1005-8885(08)60221-6

Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (3): 19-23.doi: 10.1016/S1005-8885(08)60221-6

• Wireless • Previous Articles Next Articles

Joint optimization of time and frequency synchronization based on polynomial sequences for OFDM systems

ZHANG Yan-yan, ZHANG Jian-hua, HUANG Jiang-chun, ZHANG Ping

Key Laboratory of Universal Wireless Communication (Beijing University. of Posts and Telecommunications), Ministry of Education, Beijing 100876, China

Received:1900-01-01 Revised:1900-01-01 Online:2009-06-30
Contact: ZHANG Yan-yan

Abstract

Abstract:

In orthogonal frequency division multiplexing (OFDM) systems, time and frequency synchronization are two critical elements for guaranteeing the orthogonality of OFDM subcarriers. Conventionally, with the employment of pseudonoise (PN) sequences in preamble design, the preamble information is not fully utilized in both symbol timing offset acquisition and carrier frequency offset estimation. In this article, a new synchronization algorithm is proposed for jointly optimizing the time and frequency synchronization. This algorithm uses polynomial sequences as synchronization preamble instead of PN sequences. Theoretical analysis and simulation results indicate that the proposed algorithm is much more accurate and reliable than other existing methods.

Key words:

frequency synchronization;joint optimization;OFDM;polynomial sequences;timing synchronization

ZHANG Yan-yan, ZHANG Jian-hua, HUANG Jiang-chun, ZHANG Ping. Joint optimization of time and frequency synchronization based on polynomial sequences for OFDM systems[J]. Acta Metallurgica Sinica(English letters), 2009, 16(3): 19-23.

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Joint optimization of time and frequency synchronization based on polynomial sequences for OFDM systems

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