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Orthogonal Frequency Division Multiplexing: An Overview
TLDR
This paper deals with the basic system model for OFDM based systems and with self-interference, or the corruption of desired signal by itself in OFDM systems.Abstract:
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation scheme that provides efficient bandwidth utilization and robustness against time dispersive channels This paper deals with the basic system model for OFDM based systems and with self-interference, or the corruption of desired signal by itself in OFDM systems A simple transceiver based on OFDM modulation is presented Important impairments in OFDM systems are mathematically analyzedread more
Citations
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Journal ArticleDOI
Adaptive OFDM Radar Waveform Design for Improved Micro-Doppler Estimation
TL;DR: This work analyzes the performance of a wideband orthogonal frequency division multiplexing (OFDM) signal in estimating the micro-Doppler frequency of a rotating target having multiple scattering centers and describes the accuracy and improvement in estimation accuracy due to the adaptive waveform design.
Proceedings ArticleDOI
Multi-objective optimized OFDM radar waveform for target detection in multipath scenarios
TL;DR: A constrained MOO algorithm is proposed to optimally design the spectral parameters of the OFDM waveform by simultaneously optimizing two objective functions: minimizing the upper bound on the estimation error to improve the efficiency of sparse-recovery and maximizing the squared Mahalanobis-distance to increase the performance of the underlying detection problem.
Proceedings ArticleDOI
Constant envelope coherent optical OFDM based on fast Hartley transform
TL;DR: The authors discuss the feasibility of a constant envelope optical OFDM based on fast Hartley transform, showing a back-to-back sensitivity of −34.6 dBm for a 10−3 BER.
Dissertation
Spectrum optimisation in wireless communication systems : technology evaluation, system design and practical implementation
TL;DR: The aim of this work is to reduce the complexity of existing algorithms to make them better-suited for application in the real world and to develop hardware prototypes to assess the feasibility of employing SEFDM in practical systems.
Book ChapterDOI
Designing OFDM Radar Waveform for Target Detection Using Multi-objective Optimization
TL;DR: A constrained MOO problem is proposed to design the spectral-parameters of the transmitting OFDM waveform by simultaneously optimizing three objective functions: maximizing the Mahalanobis distance to improve the detection performance, and minimizing the weighted trace of the Cramer–Rao bound matrix for the unknown parameters to increase the estimation accuracy.
References
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Journal ArticleDOI
A technique for orthogonal frequency division multiplexing frequency offset correction
TL;DR: It is shown, and confirmed by simulation, that to maintain signal-to-interference ratios of 20 dB or greater for the OFDM carriers, offset is limited to 4% or less of the intercarrier spacing.
Journal ArticleDOI
On the distribution of the peak-to-average power ratio in OFDM signals
Hideki Ochiai,Hideki Imai +1 more
TL;DR: A simple closed-form approximation for the distribution of the peak-to-average power ratio (PAPR) in strictly band-limited orthogonal frequency-division multiplexing (OFDM) signals is developed, based on the level-crossing rate analysis.
Journal ArticleDOI
Jakes fading model revisited
TL;DR: Modifications are proposed to the Jakes fading model for simulating time-correlated Rayleigh fading waveforms which solve the problem of difficult to create multiple uncorrelated fadingWaveforms.
Journal ArticleDOI
Understanding the effects of phase noise in orthogonal frequency division multiplexing (OFDM)
TL;DR: This paper analyzes the performance of OFDM systems under phase noise and its dependence on the number of sub-carriers both in the presence and absence of a phase correction mechanism.
Proceedings ArticleDOI
A comparison of peak power reduction schemes for OFDM
Stefan Müller,Johannes B. Huber +1 more
TL;DR: Two powerful and distortionless peak power reduction schemes for orthogonal frequency division multiplexing (OFDM) are compared and one investigated technique is selected mapping (SLM) where the actual transmit signal is selected from a set of signals.