Title :
An improved ESPRIT-based blind CFO estimation algorithm in OFDM systems
Author :
Yen-Chang Pan ; See-May Phoong ; Yuan-Pei Lin
Author_Institution :
Dept. of EE, Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
Carrier frequency offset (CFO) is an important issue in orthogonal frequency division multiplexing (OFDM) systems. It destroys the orthogonality between subcarriers and causes degradation in system performance. This paper presents an improved algorithm for the existing ESPRIT-based CFO estimation method. The proposed method estimates the CFO by taking the determinant of a matrix within the ESPRIT algorithm. It is a simple modification to the original ESPRIT-based method and its computational overhead is low. The performance analysis shows that the proposed method can achieve a lower mean square error.
Keywords :
OFDM modulation; frequency estimation; matrix algebra; mean square error methods; OFDM systems; carrier frequency offset; computational overhead; improved ESPRIT-based blind CFO estimation algorithm; matrix determinant; mean square error; orthogonal frequency division multiplexing systems; orthogonality; Algorithm design and analysis; Complexity theory; Eigenvalues and eigenfunctions; Estimation; Mean square error methods; OFDM; Signal to noise ratio;
Conference_Titel :
Signals, Systems and Computers, 2014 48th Asilomar Conference on
Print_ISBN :
978-1-4799-8295-0
DOI :
10.1109/ACSSC.2014.7094440
