Journal ArticleDOI
Multicarrier modem for digital HDTV terrestrial broadcasting
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TLDR
A digital modulation system using orthogonal frequency division and multiplexing (OFDM) is addressed, which presents the advantage of coping with echoes more easily than classical single-carrier modems, thanks to the insertion of a guard interval between two symbols.Abstract:
A digital modulation system using orthogonal frequency division and multiplexing (OFDM) is addressed in this paper. Such a system presents the advantage of coping with echoes more easily than classical single-carrier modems, thanks to the insertion of a guard interval between two symbols. The signal equalization is then achieved in the frequency domain. This OFDM modem is improved by using dual polarizations. In this configuration, it can convey a 70 Mbits/s (HDTV) bit stream in an 8 MHz UHF channel. Some experimental results relate field trials carried out in several countries with such equipment.read more
Citations
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Journal ArticleDOI
ML estimation of time and frequency offset in OFDM systems
TL;DR: In this paper, the joint maximum likelihood (ML) symbol-time and carrier-frequency offset estimator is presented for orthogonal frequency-division multiplexing (OFDM) systems.
Journal ArticleDOI
A time and frequency synchronization scheme for multiuser OFDM
J.-J. van de Beek,Per Ola Börjesson,Marie-Laure Boucheret,Daniel Landström,J.M. Arenas,Per Ödling,Christer Östberg,Matthias Wahlqvist,Sarah Kate Wilson +8 more
TL;DR: Performance results of an orthogonal frequency division multiplexing (OFDM)-based radio interface based on the universal mobile telecommunication system (UMTS) parameters are shown.
Proceedings ArticleDOI
Low-complex frame synchronization in OFDM systems
TL;DR: In this paper, a data-based frame synchronization method for OFDM-systems is presented, based on only the sign bits of the in-phase and the quadrature components of the received OFDM signal, the maximum likelihood solution is derived.
Patent
Multiple carrier transmission in common wave broadcasting networks
TL;DR: In this article, the authors proposed a control symbol protecting interval in the frame head of each OFDM transmission frame is larger than the data symbol protecting intervals in the wanted data areas of each transmission frame.
Journal ArticleDOI
Filtered decision feedback channel estimation for OFDM-based DTV terrestrial broadcasting system
TL;DR: This paper presents an application of a filtered decision feedback channel estimator for OFDM-based DTV systems using high order QAM modulations and the implementation and the performance of the channel estimators are discussed.
References
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Journal ArticleDOI
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.
Journal ArticleDOI
Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
TL;DR: The analysis and simulation of a technique for combating the effects of multipath propagation and cochannel interference on a narrow-band digital mobile channel using the discrete Fourier transform to orthogonally frequency multiplex many narrow subchannels, each signaling at a very low rate, into one high-rate channel is discussed.
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.
Journal ArticleDOI
An Orthogonally Multiplexed QAM System Using the Discrete Fourier Transform
TL;DR: This paper provides a novel digital signal processing method based on an N /2-point DFT processing in the O-QAM system that is more economical than the digitally implemented conventional single-channel data transmission system.
Journal ArticleDOI
Motion compensated subband coding schemes for compatible high definition TV coding
TL;DR: This paper deals with the introduction of digital HDTV in such a way that broadcast programs can be picked up by HDTV and TV sets at the same time, with low hardware complexity.