Patent
Automatic simulcast alignment
Howard LeRoy Lester,Sandeep Chennakeshu +1 more
- 20 Jul 1993
122
TL;DR: In this paper, a decision feedback equalizer (DFE) adaptively equalizes the plurality of received RF signals to substantially correct for a misalignment in time between the received signals.
read more
Abstract: A digital simulcast transmission is automatically aligned, at a simulcast receiver (22) that simultaneously receives a plurality of RF signals from a plurality of transmitters, each of the RF signals being modulated to convey identical digitally encoded information. An equalizer (24) adaptively equalizes the plurality of received RF signals to substantially correct for a misalignment in time between the received signals. The misalignment in time is due in part to a non-simultaneous transmission of the identical digitally encoded information from the plurality of transmitters. Equalizer embodiments include a Decision Feedback Equalizer (DFE) and an equalizer based on a Maximum Likelihood Sequence Estimator (MLSE). Embodiments of the DFE are an Order Recursive Lattice-DFE and a Fast Kalman DFE.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Patent
Communication system with multicarrier telephony transport
Mark J. Dapper,Michael J. Geile,Terrance J. Hill,Harold A. Roberts,Brian D. Anderson,Jeffrey Brede,Mark S. Wadman,Robert J. Kirscht,James J. Herrmann,Michael J. Fort,Steven P. Buska,Jeff Solum,Debra Lea Enfield,Darrell Berg,Thomas Smigelski,Thomas C. Tucker,Joe Hall,John M. Logajan,Somvay Boualouang,Heng Lou,Mark D. Elpers,Matt Downs,Tammy Ferris,Adam Opoczynski,David S. Russell,Calvin G. Nelson,Niranjan R. Samant,Joseph F. Chiappetta,Scott Sarnikowski +28 more
- 24 Jan 1997
TL;DR: In this article, a hybrid fiber/coax distribution network with a head end consisting of a multicarrier modem and a head-end service unit is described, and a method and apparatus for performing a Fast Fourier Transform (FFT) is presented.
382
Patent
Radio frequency control for communications systems
Aki Shohara
- 05 Jan 2000
TL;DR: In this article, an automatic frequency control (AFC) function nulls the transmitter and receiver frequency error by the frequency adjustment commands to the uplink and downlink phase rotators or to the VCXO digital-to-analog converter (VCXO DAC) by feedback control principals based on measured receiver frequency errors.
216
Patent
Demodulating digital video broadcast signals
Jonathan Highton Stott,Justin David Mitchell,Christopher Keith Perry Clarke,Adrian Paul Robinson,Oliver Paul Haffenden,Philippe Sadot,Lauret Regis,Jean-Marc Guyot +7 more
- 01 May 1998
TL;DR: In this paper, an automatic frequency control system was proposed for demodulating digital video broadcast signals with an improved automatic frequency controller, where data modulated on a multiplicity of spaced carrier frequencies were provided.
149
Patent
Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
Monisha Ghosh
- 15 Dec 1995
TL;DR: In this paper, an adaptive filter is used to tune to the periodic components of the conventional television signal to produce an error signal, which is then used to recursively update the taps of the adaptive filter.
129
Patent
Transmitting apparatus, receiving apparatus, communication system, transmission method, reception method, and communication method
Kazuyuki Sakoda,Mitsuhiro Suzuki +1 more
- 21 Mar 2005
TL;DR: In this article, the transmission path estimation method and the modulation method are selected in accordance with an attribute of the data to be transmitted, for example, the size of a transmission packet, and the transmission data is mapped by the selected modulation method, the transmission signal is processed by the transmitted signal processing method, and a transmission signal created by increase fast Fourier transform processing and transmitted.
112
References
Application of Fast Kalman Estimation to Adaptive Equalization
TL;DR: This work shows how certain "fast recursive estimation" techniques, originally introduced by Morf and Ljung, can be adapted to the equalizer adjustment problem, resulting in the same fast convergence as the conventional Kalman implementation, but with far fewer operations per iteration.
318
An adaptive MLSE receiver for TDMA digital mobile radio
TL;DR: The authors present a simulation study of an adaptive receiver, based on the concept of maximum-likelihood sequence estimation (MLSE), which compensates for the heavy selective distortions caused by multipath propagation.
140
Decision feedback equalization for digital cellular radio
S. Chennakeshu,Anand Narasimhan,J.B. Anderson +2 more
- 16 Apr 1990
TL;DR: In this paper, an adaptive decision feedback equalizer (DFE) for application in the USA digital cellular radio telephone system was proposed. But the performance sensitivity to time delay spread, Doppler shift, and timing jitter was not evaluated.
128
Adaptive Lattice Decision-Feedback Equalizers--Their Performance and Application to Time-Variant Multipath Channels
Fuyun Ling,J.G. Proakis +1 more
TL;DR: The main advantages of the lattice DFE's are their numerical stability, their computational efficiency, the flexibility to change their length, and their excellent capabilities for tracking rapidly time-variant channels.
124
Patent
High speed digital communication receiver
Jerrold L. Bonn,Paul F. Mahoney,Peter Monsen +2 more
- 25 Jun 1979
TL;DR: An improved high speed digital communications diversity receiver using a forward adaptive transversal filter equalizer, having a plurality of weighting sections in each diversity channel to provide a combined weighting signal, wherein the required complex multiplications and correlations needed for weighting purposes were performed at IF frequencies, while the time-delayed combining operations for providing the desired combined weighted output signal are performed at baseband frequencies as discussed by the authors.
120