Journal ArticleDOI
A New OFDM Synchronization Symbol for Carrier Frequency Offset Estimation
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TLDR
Simulations over frequency-selective channels confirm the superiority of the proposed method compared to recent data-aided synchronization algorithms.Abstract:
This letter proposes a new data-aided carrier frequency offset (CFO) estimation scheme for orthogonal frequency division multiplexing (OFDM) communications suitable for frequency-selective channels. The proposed method is based on the transmission of a specially designed synchronization symbol that generates a particular signal structure between the received observation samples at the receiver. This structure is exploited to derive a closed-form expression of the CFO. The proposed solution offers a wide acquisition range with reduced computational load. Simulations over frequency-selective channels confirm the superiority of the proposed method compared to recent data-aided synchronization algorithmsread more
Citations
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On Swarm Intelligence Inspired Self-Organized Networking: Its Bionic Mechanisms, Designing Principles and Optimization Approaches
TL;DR: This paper surveys different aspects of bio-inspired mechanisms and examines various algorithms that have been applied to artificial SON systems and discusses advantages, drawbacks, and further design challenges of variant algorithms.
A Processing Technique for OFDM-Modulated Wideband Radar Signals
TL;DR: In this paper, the authors proposed an OFDM pulse compression method that utilizes the cyclic prefix guard interval and the random message content in the OFDM radar signal for radar tasks.
Journal ArticleDOI
An Eigenvalue Based Carrier Frequency Offset Estimator for OFDM Systems
TL;DR: It is proved that estimating the CFO is equivalent to finding the eigenvalues of a two-dimensional ICI coefficient matrix, and the proposed estimator is proven to be a maximum likelihood estimator.
Journal ArticleDOI
Optimal pilots design for frequency offsets and channel estimation in OFDM modulated single frequency networks
TL;DR: Although the channel state information is needed in designing the proposed pilot for carrier frequency offset (CFO) estimation, the performance of the proposed CFO estimation is robust to the channel estimation error.
Dissertation
Waveform design and processing techniques in OFDM radar
TL;DR: Two processing alternatives for the case of a train of wideband OFDM pulses are developed and the first so-called time domain solution consists in applying a matched filter to compress the received echoes in the fast time before applying a fast Fourier transform in the slow time to form the range Doppler image.
References
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Journal ArticleDOI
Robust frequency and timing synchronization for OFDM
T.M. Schmidl,Donald C. Cox +1 more
TL;DR: A rapid synchronization method is presented for an orthogonal frequency-division multiplexing (OFDM) system using either a continuous transmission or a burst operation over a frequency-selective channel.
Journal ArticleDOI
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.
Journal ArticleDOI
A robust timing and frequency synchronization for OFDM systems
TL;DR: A robust symbol-timing and carrier-frequency synchronization scheme applicable to orthogonal frequency-division-multiplexing systems is presented and a new performance measure is introduced for timing estimation, based on the plot of signal to timing-error-induced average interference power ratio against the timing estimate shift.
Journal ArticleDOI
An improved frequency offset estimator for OFDM applications
Michele Morelli,Umberto Mengali +1 more
TL;DR: In this article, a pseudonoise sequence is used for carrier frequency estimation in orthogonal frequency division multiplexing (OFDM) systems, and the estimation range can be widened in proportion to L without the need of a second training symbol.
Journal ArticleDOI
Estimating the frequency of a noisy sinusoid by linear regression (Corresp.)
TL;DR: The estimation of the parameters of a sinusoid from observations of signal samples corrupted by additive noise is investigated, suggesting frequency and phase estimation by linear regression on the signal phase.
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