Title :
Multiplication-Free Estimation of Integer Frequency Offset for OFDM-Based DRM Systems
Author :
You, Young-Hwan ; Kwon, Ki-Won
Author_Institution :
uT Commun. Res. Inst., Sejong Univ., Seoul, South Korea
Abstract :
This letter proposes a low complexity integer frequency offset (IFO) estimation scheme in an orthogonal frequency division multiplexing (OFDM) based digital radio mondiale plus (DRM+) system with nonuniform phased pilot symbols. To reduce the computational complexity, the pilot symbols used for frequency estimation in the DRM+ system are partitioned into a number of pilot subsets, and pilots in each subset are phase-rotated to have a unique phase so that the estimator is made computationally efficient.
Keywords :
digital radio; estimation theory; frequency division multiplexing; OFDM-based DRM+ systems; digital radio mondiale plus system; integer frequency offset estimation; multiplication-free estimation; nonuniform phased pilot symbols; orthogonal frequency division multiplexing; Digital radio mondiale plus (DRM+); OFDM; frequency estimation;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2010.2060327
