High speed pilot-less sampling frequency acquisition for OFDM systems

Author

Chang, Ching-Chi ; Wang, Chomg-Kuang

Author_Institution

Graduate Inst. of Electron. Eng., National Taiwan Univ., Taipei, Taiwan

fYear

2005

fDate

27-29 April 2005

Firstpage

100

Lastpage

103

Abstract

This paper presents a sampling frequency offset estimation in time domain for orthogonal frequency division multiplexing (OFDM) systems. Cyclic prefix (CP) enables the estimation without pilots. The proposed algorithm realizes sampling frequency estimation on each sample within the last period where the CP copied from. The sampling-rate iteration method markedly improves acquisition speed and jitter performances. Simulations show that this method can synchronize OFDM systems in both AWGN and indoor multipath delay spread channels. Practical examples of IEEE 802.11a are used to illustrate results.

Keywords

AWGN; IEEE standards; OFDM modulation; frequency estimation; iterative methods; multipath channels; signal sampling; time-domain analysis; AWGN; CP; IEEE 802.11a; OFDM system; cyclic prefix; high speed sampling frequency acquisition; multipath delay spread channels; orthogonal frequency division multiplexing; pilot-less sampling frequency acquisition; sampling frequency offset estimation; sampling-rate iteration method; time domain; AWGN; Bandwidth; Clocks; Frequency estimation; Frequency synchronization; Jitter; OFDM modulation; Phase locked loops; Sampling methods; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test, 2005. (VLSI-TSA-DAT). 2005 IEEE VLSI-TSA International Symposium on

Print_ISBN

0-7803-9060-1

Type

conf

DOI

10.1109/VDAT.2005.1500029

Filename

1500029