Blind Estimation of OFDM Carrier Frequency Offset Using Shift-invariance Properties
نویسندگان
چکیده
We address the problem of carrier frequency offset (CFO) synchronization in Orthogonal Frequency Division Multiplexing (OFDM) communications systems in the context of frequency-selective fading channels. The mathematic model of OFDM systems with cyclic prefix (CP) and virtual subcarrier is derived. And we propose the shift-invariance CFO estimation algorithm based on DOA-MATRIX method. After the rough estimation, it can acquire the frequency offset and matrix including channel information simultaneously, which are favorable for offset compensation and demodulation of received signals. Simulation results illustrate performance of this algorithm.
منابع مشابه
Blind Carrier Frequency Offset Estimation for OFDM System with Multiple Antennas using Multiple-invariance Properties
In this paper, we address the problem of carrier frequency offset (CFO) estimation for Orthogonal Frequency Division Multiplexing (OFDM) communications systems with multiple antennas. We reconstruct the received signal to form data model with multiinvariance property, and subsequently derive a multiple-invariance ESPRIT algorithm for CFO estimation. This algorithm has improved CFO estimation co...
متن کاملIjraet Recovery of Oqam Signals Using Carrier Frequency Offset and Blind Symbol Timing Estimation in Ofdm Systems
Orthogonal frequency-division multiplexing (OFDM) systems are highly sensitive to synchronization errors. We introduce an algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. We consider the problem of blind symbol timing (ST) estimation for pulse-shaping orthogonal frequency division multiplexing (OFDM) systems based on offset quadrature am...
متن کاملNovel Carrier Frequency Offset Estimator in MIMO-OFDM System
In this paper, we address the problem of carrier frequency offset (CFO) estimation for multipleinput multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. We reconstruct the received signal to form data model with multi-invariance property, and then multiinvariance MUSIC algorithm for CFO estimation is proposed. Our proposed algorithm has the better CFO estimation pe...
متن کاملDesign of Algorithm for Blind Symbol Timing and Cfo Estimation for Ofdm/oqam Systems
Orthogonal frequency-division multiplexing (OFDM) systems are highly sensitive to synchronization errors. We introduce an algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. We consider the problem of blind symbol timing (ST) estimation for pulse-shaping orthogonal frequency division multiplexing (OFDM) systems based on offset quadrature am...
متن کاملCarrier Frequency Offset Estimation for Orthogonal Frequency Division Multiplexing Systems
Carrier Frequency Offset Estimation for Orthogonal FrequencyDivision Multiplexing Systems Xiang Nian Zeng, Ph.D. Concordia University, 2008 Orthogonal frequency division multiplexing (OFDM) is an attractive modulation scheme used in wideband communications because it essentially transforms the frequency selective channel into a flat fading channel. Furthermore, the combination of multiple-input...
متن کامل