Title :
Two-Step Frequency Estimation Algorithm For PSAM Systems
Author :
Wu, Luo ; Liu, Bin ; An, Liu
Author_Institution :
Sch. of EECS, Peking Univ., Beijing
Abstract :
In this paper, we describe and analyze a new two-step frequency estimation algorithm for pilot symbol assisted modulation (PSAM) systems with a non-uniform pilot pattern. The burst structure includes some consecutive pilots at the beginning of each burst and some sparse ones over the burst. Compared with the FFT-based (Fast Fourier Transform based) algorithm, its computational complexity is reduced greatly. It facilitates the estimation of large frequency offsets and high accuracy. Its estimation range is about plusmn20% of the symbol rate and its accuracy is close to the Cramer-Rao bound (CRB) for a low signal-to-noise ratio (SNR).
Keywords :
computational complexity; frequency estimation; quadrature phase shift keying; Cramer-Rao bound; PSAM systems; QPSK modulation; burst structure; computational complexity; nonuniform pilot pattern; pilot symbol assisted modulation systems; signal-to-noise ratio; two-step frequency estimation algorithm; AWGN; Additive white noise; Algorithm design and analysis; Computational complexity; Fast Fourier transforms; Frequency estimation; Matched filters; Pattern analysis; Sampling methods; Signal to noise ratio;
Conference_Titel :
Communication Technology, 2006. ICCT '06. International Conference on
Conference_Location :
Guilin
Print_ISBN :
1-4244-0800-8
Electronic_ISBN :
1-4244-0801-6
DOI :
10.1109/ICCT.2006.341806
