Journal ArticleDOI
Transmission techniques for digital terrestrial TV broadcasting
Reads0
Chats0
TLDR
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.Abstract:
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. The carrier synchronisation issue is dealt with before the authors introduce coded-OFDM (COFDM), which makes use of channel coding and frequency-domain interleaving. >read more
Citations
More filters
Proceedings ArticleDOI
Interference mitigation in orthogonal frequency division multiplexing (OFDM)
R.W. Lowdermilk,F.J. Harris +1 more
TL;DR: The OFDM bit error rate sensitivity to low level interference is examined and verified and a spectrum spreading technique is introduced to reduce the effect of the narrow-band interferer.
Patent
Low density parity check decoder
Kiran Gunnam,Gwan Choi +1 more
TL;DR: In this paper, a method and system for decoding low density parity check (LDPC) codes is presented, which includes an R select unit, a Q message first-in first-out (FIFO) memory, and a cyclic shifter.
Proceedings ArticleDOI
Channel estimation versus equalization in an OFDM WLAN system
Sandrine Boumard,Aarne Mammela +1 more
TL;DR: In this paper, the authors compared one-tap equalization and channel estimation structures in the frequency domain by theoretical analysis and floating point simulations, and proposed new insights on the ZF and MMSE criteria, equalization, and channel estimator.
Proceedings ArticleDOI
Distortionless reduction of peak power without explicit side information
TL;DR: An extension of SLM is proposed, which employs scrambling and refrains from transmitting explicit side information and some additional complexity and nearly vanishing redundancy is introduced to achieve markedly improved transmit signal statistics.
Journal ArticleDOI
Pilot-Aided Carrier Frequency Estimation for Filter-Bank Multicarrier Wireless Communications on Doubly-Selective Channels
TL;DR: A class of frequency estimation algorithms intended for filter bank burst-mode multicarrier transmission over time-frequency selective fading channels shows that they outperform maximum likelihood non-data-aided frequency recovery in spite of a substantially lower computational requirement.
References
More filters
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
Frequency-Independent and Frequency-Dependent Nonlinear Models of TWT Amplifiers
TL;DR: A frequencydependent quadrature model is proposed whose parameters are obtainable from single-tone measurements and is shown to fit measured data very well.
Journal ArticleDOI
Performance of an Efficient Parallel Data Transmission System
TL;DR: A parallel quadrature AM data transmission system with a number of overlapping channels, each carrying a signaling rateb, spacedb/2apart in frequency appears to be a promising technique for achieving good performance at high information rates over bandlimited dispersive transmission media.