Patent
Self-adaptive equalizer for multilevel data transmission according to correlation encoding
TLDR
In this paper, a self-adaptive equalizer comprises a transversal filter wherein the attenuators are adjusted with reference to the output signals of the filter, and means are provided for producing binary signals representative of the signs of the first filter outputs.Abstract:
A self-adaptive equalizer comprises a transversal filter wherein the attenuators are adjusted with reference to the output signals of the filter. For use in a multilevel data transmission system according to correlative encoding, a first filter removes the correlation encoding from the transversal filter outputs. Means is provided for producing binary signals representative of the signs of the first filter outputs. A second filter encodes the binary signals in accordance with the correlative encoding. The attenuators are adjusted in compliance with the respective products of the difference between one each of the second and transversal filter outputs and the signals derived from those taps of the delay line of the transversal filter to which the relevant attenuators are connected.read more
Citations
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Patent
Signal processing system
TL;DR: In this article, the signal recognizer is incorporated in a weight control circuit that employs a positive signal feedback network for obtaining an optimal signal-to-noise ratio within the weight-control circuit, the correlation discriminant operator properties are advantageously employed to cause desired terms, namely, the signal components of interest, to largely retain their correlation properties, while causing the undesired terms, such as noise, jamming, etc, to become uncorrelated with other signals, so that a weight-controlled signal that achieves a maximizing of the signal to noise ratio can be
Patent
Automatic equalizing method and system
TL;DR: In this article, a transversal filter receives and filters the baseband data signal and the thus filtered data signal is compensated for its dynamic distortion by a compensation network, where the error signal is separated into a steady state component and a dynamic component.
Patent
Arrangement for combining data symbols in accordance with a predetermined weighting function
TL;DR: In this article, a transversal filter augmented with a baud rate control circuit is proposed to minimize distortion in phase modulated signal elements (data symbols) by combining a predetermined shaping function with a transverse filter.
Patent
Systems with increased information rates using embedded sample modulation and predistortion equalization
TL;DR: In this paper, a system is described which achieves an increased rate of transmission by transmitting multiple symbols in one symbol time, where the information in the overlapping symbols can be recovered if the symbol used for transmission is chosen so that a subset of the samples representing the symbol has an inverse.
Patent
Transversal type automatic phase and amplitude equalizer
TL;DR: In this paper, a transversal type automatic equalizer includes circuits for differentiating the equalized signal, sampling the equalised signal under the control of a timing signal, and generating an error signal from the sampled signal.
References
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Patent
Fast start-up system for transversal equalizers
K Mueller,D Spaulding +1 more
TL;DR: In this paper, the initial convergence of automatic transversal equalizer tap gain settings is rapidly achieved without first establishing synchronization between a test signal incoming at a receiving location over a distorting transmission channel and a locally generated ideal reference signal.
Patent
Adaptive dc restoration in single-sideband data systems
D Hirsch,D Spaulding +1 more
TL;DR: In this article, a transversal filter in series with a data detection circuit at the receiver is made jointly responsive to a common error component to both equalize and restore dc components adaptively to a received signal.
Patent
Joint initial setting of attenuator coefficients and sampling time in automatic equalizers for synchronous data transmission systems
TL;DR: In this paper, the parameters of sampling time and transversal equalizer tap gain coefficients are set in a single adjustment to provide an open data eye pattern, which is assured by inversely orthogonalizing the tap output signals from the Transversal Equalizer.