A blind uplink OFDM synchronization algorithm based on cyclostationarity

Author

Hua, Meng ; Zhu, Jinkang

Author_Institution

PCN&SS Lab., Univ. of Sci. & Technol. of China, Hefei, China

Volume

2

fYear

2005

fDate

30 May-1 June 2005

Firstpage

1002

Abstract

A blind uplink synchronization algorithm of multiuser OFDM system is introduced in this article. The algorithm exploits the second-order cyclostationarity of the received signal, to estimate the carrier frequency offset and symbol time delay of every user. And a modified frequency offset estimation algorithm based on second-order conjugate cyclostationarity is proposed too. The characteristic of high resolution and immune to the effects of noise and interference can be achieved. Finally, the simulation results show the performance of estimators as the function of SNR and record length, and also compare with other algorithm.

Keywords

OFDM modulation; delays; frequency estimation; radio links; radiofrequency interference; synchronisation; blind uplink OFDM synchronization algorithm; carrier frequency estimation; interference effects; second-order conjugate cyclostationarity; symbol time delay; Autocorrelation; Base stations; Delay effects; Delay estimation; Frequency estimation; Frequency synchronization; Interference; OFDM; Signal resolution; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st

ISSN

1550-2252

Print_ISBN

0-7803-8887-9

Type

conf

DOI

10.1109/VETECS.2005.1543457

Filename

1543457