Research on Time-Domain Correlation Technique Based on ZC Sequences in OFDM System

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Abstract:

OFDM modulation signal based on different Pseudo-random Noise sequences cant be discriminated in time domain in OFDM system. In order to resolve this problem, the time-domain sliding correlation technique based on ZC sequences is proposed, and the relations between the time-domain correlation properties and the length of the sequence are analyzed. On the basis of the analysis of the technique, the optimum scheme of time-domain sliding correlation is done by the aid of the comparison of the auto-correlation gain on the condition of limited symbol length and band-width. Simulation results in AWGN channel show that OFDM demodulation signal based on ZC sequences designed newly in this work has good auto-correlation and cross-correlation properties in time domain.

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500-503

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February 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] Ai Bo, Wang Jintao and Zhong Zhangdui. Synchronization technology for OFDM system,. [M]. Beijing: Posts & Telecommunications Press. April 2011. (in Chinese).

Google Scholar

[2] China's State Administration for Radio, Film and Television, GY/T 220. 1-2006 Mobile Multimedia Broadcasting[S], 2006. (in Chinese).

Google Scholar

[3] Changjiang Huang, YongHui Hua, Yu Hua etc. Research On Pseudo-range Measurement Technique for CMMB system, UFFC, 2013(in press).

Google Scholar

[4] R.C. Heimiller, Phase Shift Pulse Codes with Good Periodic Correlation Properties, [J], IEEE trans. Inform. Theory. pp: 254-257 Oct. (1961).

DOI: 10.1109/tit.1961.1057655

Google Scholar

[5] Branislav M. Popovid, Generalized Chirp-Like Polyphase Sequences with Optimum Correlation Properties. IEEE trans. Inform. Theory. Vol. 38, No. 4, pp: 1406-1409. July (1992).

DOI: 10.1109/18.144727

Google Scholar

[6] DAVID C. CHU, Polyphase Codes With Good Periodic Correlation Properties[J], IEEE trans. Inform. Theory . pp.531-532, Dec. (1972).

DOI: 10.1109/tit.1972.1054840

Google Scholar