Novel Blind Carrier Frequency Offset Estimation Algorithm for OFDM System Via Generalized Precoding

Authors:
Zhang Xiaofei;Li Jianfeng;Wu Hailang;Xu Dazhuan
Affiliations:
Electronic Engineering Department, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Electronic Engineering Department, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Electronic Engineering Department, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Electronic Engineering Department, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016
Venue:
Wireless Personal Communications: An International Journal
Year:
2012

Citing 2
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Non-orthogonal joint diagonalization in the least-squares sensewith application in blind source separation

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ML estimation of time and frequency offset in OFDM systems

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Abstract

In this letter, we develop a blind carrier frequency offset (CFO) algorithm for orthogonal frequency division multiplexing (OFDM) systems by utilizing a generalized precoding. Generalized precoding is employed to obtain multiple covariance matrices, and then a CFO estimation algorithm for OFDM system using joint diagonalization is proposed. Comparing to estimation of signal parameters via rotational invariance techniques (ESPRIT) method, the algorithm that we presented has improved CFO estimation performance. Furthermore, our algorithm even works well without virtual carrier. Simulation results illustrate performance of this algorithm.