Title :
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
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;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465730
