Journal ArticleDOI
A high-efficiency carrier estimator for OFDM communications
TLDR
Two blind carrier offset estimation algorithms are presented by exploiting the intrinsic structure information of OFDM signals to offer the accuracy of super resolution subspace methods, viz., MUSIC and ESPRIT, without involving computationally intensive subspace decompositions.Abstract:
While multipath induced phase rotations can be dealt with by differential encoding in orthogonal frequency division multiplexing (OFDM) communications, the loss of orthogonality due to the carrier offset must be compensated before discrete Fourier transform (DFT)-based demodulation can be performed. In this letter, we present a high-performance/low-complexity blind carrier offset estimation algorithm by exploiting intrinsic structure information of OFDM signals. The algorithm offers the accuracy of a super resolution subspace method, viz. MUSIC, without involving computationally intensive subspace decompositions.read more
Citations
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Journal ArticleDOI
OFDM and Its Wireless Applications: A Survey
TL;DR: This paper addresses basic OFDM and related modulations, as well as techniques to improve the performance of OFDM for wireless communications, including channel estimation and signal detection, time- and frequency-offset estimation and correction, peak-to-average power ratio reduction, and multiple-input-multiple-output (MIMO) techniques.
Journal ArticleDOI
Multicarrier Communication Over Underwater Acoustic Channels With Nonuniform Doppler Shifts
TL;DR: In this paper, the authors proposed a two-step approach to mitigate the Doppler effect: 1) non-uniform DoP compensation via resampling that converts a wideband problem into a narrowband problem and 2) high-resolution uniform compensation of the residual DoP.
Journal ArticleDOI
Synchronization Techniques for Orthogonal Frequency Division Multiple Access (OFDMA): A Tutorial Review
TL;DR: The goal of this paper is to provide a comprehensive survey of the latest results in the field of synchronization for OFDMA systems, with tutorial objectives foremost.
Journal ArticleDOI
OFDM blind carrier offset estimation: ESPRIT
TL;DR: The intrinsic structure information of OFDM signals is exploited to derive a carrier offset estimator that offers the accuracy of a super resolution subspace method, ESPRIT.
Journal ArticleDOI
Blind carrier frequency offset estimation in SISO, MIMO, and multiuser OFDM systems
TL;DR: A low-complexity blind carrier frequency offset estimator for orthogonal frequency-division multiplexing (OFDM) systems is developed using a kurtosis-type criterion, and it is shown that this approach can be applied to blind CFO estimation in multi-input multi-output and multiuser OFDM systems.
References
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Journal ArticleDOI
Multiple emitter location and signal parameter estimation
TL;DR: In this article, a description of the multiple signal classification (MUSIC) algorithm, which provides asymptotically unbiased estimates of 1) number of incident wavefronts present; 2) directions of arrival (DOA) (or emitter locations); 3) strengths and cross correlations among the incident waveforms; 4) noise/interference strength.
Journal ArticleDOI
Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform
Stephen B. Weinstein,P. Ebert +1 more
TL;DR: The Fourier transform data communication system is described and the effects of linear channel distortion are investigated and a differential phase modulation scheme is presented that obviates any equalization.
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BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise
TL;DR: In this contribution the transmission of M-PSK and M-QAM modulated orthogonal frequency division multiplexed (OFDM) signals over an additive white Gaussian noise (AWGN) channel is considered and the degradation of the bit error rate is evaluated.
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Transmission techniques for digital terrestrial TV broadcasting
TL;DR: The authors discuss the potential of OFDM signaling, with its limitations and inherent problems, as well as another potential technique that has so far been overlooked: single-carrier transmission with frequency- domain equalization, and introduces coded-OFDM (COFDM), which makes use of channel coding and frequency-domain interleaving.
Journal ArticleDOI
ESPRIT--A subspace rotation approach to estimation of parameters of cisoids in noise
TL;DR: The application of a subspace invariance approach (ESPRIT) to the estimation of parameters (frequencies and powers) of cisoids in noise is described, which has several advantages including improved resolution over Pisarenko's technique for harmonic retrieval.