Journal ArticleDOI
BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise
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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.Abstract:
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. The degradation of the bit error rate (BER), caused by the presence of carrier frequency offset and carrier phase noise is analytically evaluated. It is shown that for a given BER degradation, the values of the frequency offset and the linewidth of the carrier generator that are allowed for OFDM are orders of magnitude smaller than for single carrier systems carrying the same bit rate. >read more
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Proceedings ArticleDOI
Maximum likelihood tracking algorithms for MIMO-OFDM
Christian Oberli,Babak Daneshrad +1 more
TL;DR: Simulation results show that larger MIMO configurations benefit from lower estimator variances, providing increased synchronization accuracy at low SNRs, or allowing for a reduction of the number of pilot subcarriers.
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Estimation and Compensation of I/Q Imbalance in OFDM Direct-Conversion Receivers
Kuang-Yu Sung,Chi-chao Chao +1 more
TL;DR: Two methods for I/Q imbalance compensation are proposed: the maximum-likelihood estimation (MLE)-based method and the least-square estimation (LSE-based method, which are robust against different gain and phase imbalances.
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RF Impairments in Wireless Transceivers: Phase Noise, CFO, and IQ Imbalance – A Survey
TL;DR: In this article, the authors present RF-impairment signal models and discuss their impacts, including phase noise (PN), carrier frequency offset (CFO), and in-phase (I) and quadrature-phase imbalance.
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Symbol synchronization technique in COFDM systems
A.I. Bo,Ge Jianhua,Wang Yong +2 more
TL;DR: A new method utilizing pilots to do coarse symbol timing is proposed, which overcomes the problem of fluctuation of the estimated symbol start position with cyclic prefix correlation method.
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Joint compensation of IQ imbalance and phase noise in OFDM wireless systems
TL;DR: It is shown that the proposed compensation scheme can effectively improve the signal-to-noise ratio at the receiver, simplifying the RF and analog circuitry design in terms of implementation cost, power consumption, and silicon fabrication yield.
References
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Multicarrier modulation for data transmission: an idea whose time has come
TL;DR: The general technique of parallel transmission on many carriers, called multicarrier modulation (MCM), is explained, and the performance that can be achieved on an undistorted channel and algorithms for achieving that performance are discussed.
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A discrete multitone transceiver system for HDSL applications
TL;DR: A discrete multitone (DMT) transceiver design for high bit rate digital subscriber line (HDSL) access is presented and analyzed and is an excellent candidate for HDSL implementation.
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Performance of an RCPC-coded OFDM-based digital audio broadcasting (DAB) system
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Journal ArticleDOI
The effect of interpolation on the BER performance of narrowband BPSK and (O)QPSK on Rician-fading channels
K. Bucket,Marc Moeneclaey +1 more
TL;DR: By means of theoretical analysis, it is demonstrated that even simple interpolators, operating at only a few samples per symbol, yield BER degradations that are limited to a small fraction of a dB.
Journal ArticleDOI
Digital HDTV broadcasting over the CATV distribution system
Marc Moeneclaey,Mark Van Bladel +1 more
TL;DR: This contribution deals with the digital broadcasting of HDTV channels over the cable television (CATV) distribution system, using either single-carrier QAM or an orthogonal frequency division multiplex of many QAM carriers to represent an HDTV channel.