High speed pilot-less sampling frequency acquisition for DMT systems

Author

Chang, Ching-Chi ; Wang, Chorng-Kuang

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2005

fDate

23-26 May 2005

Firstpage

4895

Abstract

This paper presents a sampling frequency offset estimation in time domain for discrete multitone (DMT) systems. Cyclic prefix (CP) enables this 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 performance. Simulations show that this method can synchronize DMT systems in both AWGN channels and twisted pair copper wires along with non-ideal factors. Practical examples of the very-high bit-rate digital subscriber lines (VDSL) are used to illustrate results.

Keywords

AWGN channels; copper; digital subscriber lines; frequency estimation; iterative methods; jitter; modulation; phase locked loops; signal detection; signal sampling; twisted pair cables; AWGN channels; DMT systems; VDSL; acquisition speed; discrete multitone systems; frequency offset estimation; high speed sampling frequency acquisition; jitter performance; phase locked loops; pilot-less sampling frequency acquisition; sampling frequency acquisition; sampling-rate iteration method; time domain; twisted pair copper wires; very-high bit-rate digital subscriber lines; Bandwidth; Clocks; Copper; Frequency estimation; Frequency synchronization; Jitter; OFDM modulation; Phase locked loops; Sampling methods; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1465730

Filename

1465730